Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
toc thien » toc thieu, ton thien, duoc thien
van luong » van cuong, nang luong, van chuong
van duong » van dong, van dung, van phong
cong lap » cong luan, cong lang, cong tac
van chat » cao chat
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thien hach - thanh cong lap ((van luong) or (van duong)) dan van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thien hach - thanh cong lap ((van luong) OR (van duong)) dan van chat*.