Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
canh trinh » hanh trinh, canh tinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
hoc tien » hoc tieng, hoc hien, hoc vien
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien thanh - ((canh trinh) or (canh tranh)) va nhung cong dan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien thanh - ((canh trinh) OR (canh tranh)) va nhung cong dan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien thanh - ((canh trinh) or (canh tranh)) va nhung cong dan ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc tien thanh - ((canh trinh) or (canh tranh)) va nhung cong dan ((toan cau) OR (toan ban))*.