Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
chieu tinh » trieu tinh, lieu tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu tinh) or (chau tinh)) - thanh ((trung thanh) OR (truong thanh)) nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (chau tinh)) - thanh ((trung thanh) OR (truong thanh)) nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (chau tinh)) - thanh ((trung thanh) OR (truong thanh)) nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (chau tinh)) - thanh ((trung thanh) OR (truong thanh)) nhung cong tac toan tap*.