Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trung » thanh trung, hanh trang, manh trung
nhung hong » nhung chong, nhung huong, nhung phong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
hong van » hoang van, thong van, phong van
van quan » van ban
quan ban » quang ban, qua ban, quan 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 ((nhieu tang) or (hieu qua)) - hanh trung cua nhung hong van quan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (hieu qua)) - hanh trung cua nhung hong van quan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (hieu qua)) - hanh trung cua nhung hong van quan ban*.