Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai
tranh va » tranh van, trang va, trinh va
cong van » cong vang, cong san, song 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 nang - canh tranh va nhung cong van ((thanh tap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien nang - canh tranh va nhung cong van ((thanh tap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: hoc thien nang - canh tranh va nhung cong van ((thanh tap) or (thanh lap))*.