Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trang cua » tranh cua, tang cua, trung cua
tang luan » dung luan
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
hieu ca » hieu cac, hieu cua, hieu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu ca - hanh ((trang cua) or (tang luan)) nhung cong san ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu ca - hanh ((trang cua) OR (tang luan)) nhung cong san ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu ca - hanh ((trang cua) or (tang luan)) nhung cong san ((toan tai) or (toan ban))*.