Perhaps you should try some spelling variations:
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 cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
hang nong » thang long, han tong
tuan cao » toan cao, juan cao, quang cao

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 cua ((bang cong) or (hang nong)) anh tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien thanh)) - hanh tranh cua ((bang cong) OR (hang nong)) anh tuan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien thanh)) - hanh tranh cua ((bang cong) or (hang nong)) anh tuan cao*.