Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thien anh » thien danh, tien anh, thien chanh
tranh cac » trinh cac, thanh cac, tranh cai
van tan » van tuan, van tai, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien anh) or (thien thanh)) - hanh tranh cac truong cong ((van tan) OR (van ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien thanh)) - hanh tranh cac truong cong ((van tan) OR (van ban)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (thien thanh)) - hanh tranh cac truong cong ((van tan) OR (van ban)) cau*".