Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
trinh cua » trinh luat, trinh quan, trinh luan
dung cong » dung trong
tinh cua » sinh cua, tinh chat, tranh 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: ((theo chieu) or (toc thieu)) xanh - hanh ((trinh cua) or (tinh cua)) dung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (toc thieu)) xanh - hanh ((trinh cua) OR (tinh cua)) dung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (toc thieu)) xanh - hanh ((trinh cua) or (tinh cua)) dung cong tac toan cao*.