Perhaps you should try some spelling variations:
theo nhieu » theo chieu, theo tieu, he nhieu
nhieu tang » chieu sang, hieu lang, nhiet nang
bang song » nang song
than toan » thanh toan, thuat toan, than thoai
than tuan » thanh tuan, tran tuan, thanh xuan
tang van » dang van, hoang van, trong van
thang va » hang va, trang va, thong va

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: theo nhieu tang - hanh ((tang van) OR (thang va)) bang song ((than toan) OR (than tuan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo nhieu tang - hanh ((tang van) or (thang va)) bang song ((than toan) OR (than tuan)) cao~".
• Adding a wildcard symbol may retrieve word variants: theo nhieu tang - hanh ((tang van) or (thang va)) bang song ((than toan) OR (than tuan)) cao*.