Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
thanh tra » thanh toan, thanh hoa
dung song » dung cong, dung dong, dong song
vung song » vung dong, xuong song, nang song
tra tuan » tran tuan, tra quan, tri tuan
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) OR (thieu quang)) - thanh tra tuan ((dung song) or (vung song)) van tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - thanh tra tuan ((dung song) OR (vung song)) van tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - thanh tra tuan ((dung song) or (vung song)) van tan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - thanh tra tuan ((dung song) or (vung song)) van tan cau*.