Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
tien hach » tien hanh, tien thanh, hien hanh
canh tran » canh tranh, hanh trang, banh trang
dung cong » dung trong
tran van » luan van
van dung » van dong, xay dung, tin dung
dam phan » d phan, va phan, van phan
dan phan » doan phan, dan chan, van phan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((tien hach) OR (thien hach)) - canh tran van dung cong ((dam phan) OR (dan phan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((tien hach) OR (thien hach)) - canh tran van dung cong ((dam phan) or (dan phan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((tien hach) OR (thien hach)) - canh tran van dung cong ((dam phan) or (dan phan)) cau*.