Perhaps you should try some spelling variations:
nguoi chien » nguoi chuyen, nguoi thieu, nguoi chet
trinh chao » trinh chat, trinh han, trinh co
nguoi vien » nguoi viet, nguoi tien, nguoi tieu
cong tinh » cong vinh, long tinh, cong thanh
trinh cau » trinh chat, trinh tu, trinh han
cach dang » cach mang, cac dang, cach dung
chao dang » cao dang, chan dang, chao yang
dang van » hoang van, hang va
hoi viet » hai viet, oi viet, thai viet
cau nang » cam nang, cao nang, cuu nang
cam cho » cap cho, cao cho, cay cho
cac cay » ca cay, cac cau, tac cay
cac cac » cac cach, ca cac, cac bac
van cac » van hac, van cau, van bac
cac cap » cao cap, cac cau, cac tap
nang va » nang van, hang va, nang ma
cac cam » cad cam, cac cau, cac ham
do hoi » do choi, do hoai, do thoi
co hoi » co loi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( cong tinh cach dang van ((cac cap) or (cac cay)) do hoi viet nam ) or ( cong trinh chao dang van cac cac ((co hoi) OR (co hoc)) viet nam ))) or ( cong trinh cau nang va cac cam cho ((nguoi vien) or (nguoi chien)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( cong tinh cach dang van ((cac cap) OR (cac cay)) do hoi viet nam ) OR ( cong trinh chao dang van cac cac ((co hoi) OR (co hoc)) viet nam ))) OR ( cong trinh cau nang va cac cam cho ((nguoi vien) OR (nguoi chien)) nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( cong tinh cach dang van ((cac cap) or (cac cay)) do hoi viet nam ) or ( cong trinh chao dang van cac cac ((co hoi) OR (co hoc)) viet nam ))) or ( cong trinh cau nang va cac cam cho ((nguoi vien) or (nguoi chien)) nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( cong tinh cach dang van ((cac cap) or (cac cay)) do hoi viet nam ) or ( cong trinh chao dang van cac cac ((co hoi) OR (co hoc)) viet nam ))) or ( cong trinh cau nang va cac cam cho ((nguoi vien) or (nguoi chien)) nam ))*.