Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, nhung don
hoc thien » hoc hien, hoc thieu, hoc thiet
hang cong » dang cong, hang nong, bang cong
tuan dang » tran dang, tuan bang, tuan dung
tranh va » tranh van, trang va, trinh va
van tuan » van quan, van ban, anh tuan

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 - canh tranh va ((nhung cong) or (hang cong)) van tuan dang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - canh tranh va ((nhung cong) OR (hang cong)) van tuan dang.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - canh tranh va ((nhung cong) or (hang cong)) van tuan dang*.