Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, truong cong
thuong dong » phuong dong, tuong dong, chuong dong
hoc hieu » hoc thieu, doc hieu, hoc dieu
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap
cong va » dong va, cong ha, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc hien)) quang - thanh cong va ((thuong cong) OR (thuong dong)) ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) quang - thanh cong va ((thuong cong) OR (thuong dong)) ban than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc hien)) quang - thanh cong va ((thuong cong) OR (thuong dong)) ban than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) quang - thanh cong va ((thuong cong) OR (thuong dong)) ban than cau*.