Perhaps you should try some spelling variations:
quan nhung » qua nhung, cua nhung, luan chung
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
hanh dong » anh dong, ha dong
dong quan » duong quan, dong quang, dung quan
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhieu tang) or (hieu lang)) - hanh dong quan nhung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (hieu lang)) - hanh dong quan nhung cong van van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (hieu lang)) - hanh dong quan nhung cong van van ban*.