Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
tien manh » tien anh, tien thanh, tieng anh
thoai cac » tai cac, thong cac, tho cac
hoc tien » hoc tieng, hoc hien, hoc vien
tuong va » truong va, thuong va, luong va
cong van » cong vang, song van, cong tan
cong san » cong tac
thai cao » tai cao, thuat cao, toan cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien manh - thanh tuong va nhung ((cong van) OR (cong san)) ((thai cao) OR (thoai cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien manh - thanh tuong va nhung ((cong van) or (cong san)) ((thai cao) OR (thoai cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc tien manh - thanh tuong va nhung ((cong van) or (cong san)) ((thai cao) OR (thoai cac))*.