Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
song cua » cong cua, huong cua, thong cua
dong cua » dung cua, cong cua, huong cua
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cao » toan ban, toan tap

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 thanh - thanh ((song cua) OR (dong cua)) nhung ((cong dan) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - thanh ((song cua) OR (dong cua)) nhung ((cong dan) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien thanh - thanh ((song cua) OR (dong cua)) nhung ((cong dan) or (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - thanh ((song cua) OR (dong cua)) nhung ((cong dan) or (cong tac)) toan cao*.