Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
theo chieu » theo tieu, theo chu, thi chieu
thuong con » thuong dong, truong cong, thong cong
tranh cua » doanh cua, manh cua
ho chieu » hoc thieu, doi chieu, mot chieu
tap toan » tap doan, tap quan, bai toan
toan ban » van 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 (ho chieu)) xanh - canh tranh cua ((thuong cong) OR (thuong con)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) xanh - canh tranh cua ((thuong cong) OR (thuong con)) tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) xanh - canh tranh cua ((thuong cong) OR (thuong con)) tap toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) xanh - canh tranh cua ((thuong cong) OR (thuong con)) tap toan ban*.