Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trung tam
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
hoc thi » hoc thai, hoc tai, hoc chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thi thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thi thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thi thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan cao*.