Perhaps you should try some spelling variations:
thanh trung » thanh tung
phai nhuong » phan thuong, pham thuong, pham chuong
chieu tinh » trieu tinh, lieu tinh, chau tinh
phat nhung » pha nhung, thuat nhung, tham nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

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