Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh
nhung cong » dung cong, thong cong, hang cong
den thanh » de thanh, dinh thanh, dong thanh
tinh cua » trinh cua, sinh cua, tranh cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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