Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, lieu vien
lanh hoi » lanh hai, lanh voi, hanh thoi
tan lanh » tai lanh, thanh lanh, tan thanh
nang xa » nang x, lang xa, nang ma
cac duc » cao duc, cac dac, cac nuoc
vu sach » vu bach, vu khach
hoi cua » hoi chuc
su sach » so sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky nang xa hoi. hieu vien ((cac duc) OR (cac du)) tan lanh hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu vien ((cac duc) OR (cac du)) tan lanh hoi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang xa hoi. hieu vien ((cac duc) OR (cac du)) tan lanh hoi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang xa hoi. hieu vien ((cac duc) OR (cac du)) tan lanh hoi cua triet*.