Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh tuong » thanh thuong, thanh tung, thanh huong
hien nhanh » hien hanh, tien thanh, dien thanh
tuong cua » truong cua, huong cua, thong cua
dang song » nang song, dang cong, bang song
quang cao » nang cao, quang nam
cua dang » cua cong, cua ban
song van » hoang van, trong van, duong van
tuan cao » toan cao, juan cao, thuan cam

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

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