Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
doanh vat » doanh bat, doanh van, doanh xuat
dung cong » dung trong
theo chu » cho chu, chao chu, theo yeu
doanh va » doan va, doanh tai, doanh cua
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan tap » toan 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 chieu) or (theo chu)) xanh - hanh ((doanh vat) OR (doanh va)) dung cong tam toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - hanh ((doanh vat) OR (doanh va)) dung cong tam toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) xanh - hanh ((doanh vat) OR (doanh va)) dung cong tam toan tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - hanh ((doanh vat) OR (doanh va)) dung cong tam toan tap*.