Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
pha thong » phap thong, phan thong, pho thong
hoc hieu » hoc thieu, hoc hien, doc hieu
tung pha » tung pham, trung phan, trung phat
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
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: hoc hieu lang - thanh tung pha thong cong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - thanh tung pha thong cong tac ((toan cau) OR (toan tap))*.