Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
trung cap » truong cao, trung tam
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
mang cua » manh cua, dung cua, ban cua
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 (doi chieu)) xanh - hanh ((mang cua) or (trung cap)) dung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh ((mang cua) OR (trung cap)) dung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh ((mang cua) or (trung cap)) dung cong tac toan cao*.