Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
van duong » van dong, van dung, van phong
thanh ta » thanh tra, thanh tai, thanh tay
cong tan » cong tac, cong san, cong thanh
tan hanh » tan thanh, tang hanh, toan hanh
hanh bac » nhanh bac, thanh bac, hanh cac
ta van » tan van, tap van, va van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (toc thieu)) tinh - thanh ta van duong cong tan hanh bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (toc thieu)) tinh - thanh ta van duong cong tan hanh bac.
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (toc thieu)) tinh - thanh ta van duong cong tan hanh bac*.