Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
hoc thai » toc thai, hoc tai, hoc hai
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 tap » toan ban
hoc thi » hoc tai, hoc chi, hoc khi

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) or (hoc thai)) thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thi) OR (hoc thai)) thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thi) or (hoc thai)) thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thi) or (hoc thai)) thanh - thanh ((trung va) OR (truong va)) nhung cong dan toan tap*.