Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
nho hieu » nha hieu, nho sieu, nhu hieu
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu quan - canh trinh va nhung cong dan ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu quan - canh trinh va nhung cong dan ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: nho hieu quan - canh trinh va nhung cong dan ((toan tai) or (toan tap))*.