Perhaps you should try some spelling variations:
trinh cau » trinh chat, trinh chao, trinh tu
soi viet » hoi viet, oi viet, doi viet
cau dang » cao dang, cac dang, cau danh
trinh do » trinh ky
cac cac » cac cach, ca cac, cac bac
cac cam » cad cam, cac cap, cac cau
so viet » hoc viet
lanh va » hanh va, anh va, doanh va
lang va » lang van, hang va, lang ha
cac cay » ca cay, cac cap, cac cau
dang va » dang van, dang vat, hang va
cam lo » nam lo, cam ly, cam o
lan va » luan va, lan van, ban va
co soi » cot soi, co hoi, co loi
cay co » tay co, cay cong
cac co » cac cong
lo soi » lo so, mo soi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong trinh do ((lanh va) OR (lanh dao)) cac cac co so viet nam ) or ((( cong trinh cau ((lan va) or (lang va)) cac cay co soi viet nam ) or ( chuong trinh cau dang va cac cam lo soi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh do ((lanh va) OR (lanh dao)) cac cac co so viet nam ) OR ((( cong trinh cau ((lan va) OR (lang va)) cac cay co soi viet nam ) OR ( chuong trinh cau dang va cac cam lo soi viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh do ((lanh va) OR (lanh dao)) cac cac co so viet nam ) or ((( cong trinh cau ((lan va) or (lang va)) cac cay co soi viet nam ) or ( chuong trinh cau dang va cac cam lo soi viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( chuong trinh do ((lanh va) OR (lanh dao)) cac cac co so viet nam ) or ((( cong trinh cau ((lan va) or (lang va)) cac cay co soi viet nam ) or ( chuong trinh cau dang va cac cam lo soi viet nam ))))*.