Perhaps you should try some spelling variations:
chong cong » cong cong, thong cong, cuong cong
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, trung cua, thang cua
ho chieu » theo chieu, doi chieu, mot chieu
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - hanh ((trang cua) or (tang cua)) chong cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh ((trang cua) OR (tang cua)) chong cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - hanh ((trang cua) or (tang cua)) chong cong tac toan cao*.