Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
truong dao » truong cao, truong bo
thong cong » trong cong, tong cong, thong thong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cao » chan cho, chat cao, chay cao

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