Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hanh trinh » canh tranh, hanh chinh
theo lieu » theo tieu, theo chieu, thi lieu
theo yeu » theo tieu, thiet yeu, theo chu
trinh va » trinh van, trinh vat, trinh ve
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo lieu) or (theo yeu)) tinh - hanh trinh va thuong cong ((tan toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo lieu) OR (theo yeu)) tinh - hanh trinh va thuong cong ((tan toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo lieu) or (theo yeu)) tinh - hanh trinh va thuong cong ((tan toan) or (tap toan)) cau*.