Perhaps you should try some spelling variations:
trong nghien » truong nghien, tron nghien, trong nhien
chinh trong » chinh cong
nghien tong » nghiep trong, nghiem tuong, nghiep thong
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dung cong
doi hieu » doi chieu, doc hieu, doi hien
cong tac » cong ty
tac tai » tac trai, tac thi, bac tai
tai cao » thai cao, tao cao, tai sao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - chinh trong nghien tong cong tac tai cao~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - chinh trong nghien tong cong tac tai cao*.