Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
cua dang » cua cong, cua ban
doan van » doan va, hoang van, luan van
dang van » hoang van, hang va
dan van » dao van, tan van, san 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 thien hach - thanh trung cua dang cong ((((dan van) or (doan van))) or (dang van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh trung cua dang cong ((((dan van) OR (doan van))) OR (dang van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh trung cua dang cong ((((dan van) or (doan van))) or (dang van)) ban*.