Perhaps you should try some spelling variations:
doi chiet » doi chi, doi viet, doi chinh
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
doc hieu » toc thieu, hoc thieu, hoc hien
van cong » van dong, van phong, phan cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
cua van » cua ban, cua vat, cua dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chiet) or (((doi chieu) OR (doc hieu)))) tach - canh tranh cua van cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chiet) OR (((doi chieu) OR (doc hieu)))) tach - canh tranh cua van cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chiet) or (((doi chieu) OR (doc hieu)))) tach - canh tranh cua van cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chiet) or (((doi chieu) OR (doc hieu)))) tach - canh tranh cua van cong tac toan cau*.