Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
tang cua » mang cua, hang cua, tang luan
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

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