Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
cap thong » cap tong, chap thuong, phap thong
doc hieu » toc thieu, hoc thieu, hoc hien
tung cap » trung cap, cung cap, thong cap
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - thanh tung cap thong ((cong dong) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - thanh tung cap thong ((cong dong) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh tung cap thong ((cong dong) or (cong san)) toan cao*.