Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, trung cua
tran tuan » tran xuan, tran quang, tran thanh
cong van » cong vang, cong san, song van
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((trang cua) or (tran tuan)) nhung ((cong van) or (cong quang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trang cua) OR (tran tuan)) nhung ((cong van) OR (cong quang)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trang cua) or (tran tuan)) nhung ((cong van) or (cong quang)) toan cao*.