Perhaps you should try some spelling variations:
doanh cua » doanh luan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
doanh va » doan va, doanh tai, hanh va
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: ((ho chieu) OR (theo chu)) xanh - hanh ((doanh va) OR (doanh cua)) dung cong tam toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chu)) xanh - hanh ((doanh va) OR (doanh cua)) dung cong tam toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chu)) xanh - hanh ((doanh va) OR (doanh cua)) dung cong tam toan tap*.