Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chieu sang, chieu xanh
va phuong » va thuong, cac phuong
trung va » truong va, trang va, trung ha
tan chan » dan chan, can chan, tam chan
ban chan » dan chan, ban than, ban nhan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chiet tach)) - thanh trung va phuong cong ((tan chan) OR (ban chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - thanh trung va phuong cong ((tan chan) OR (ban chan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - thanh trung va phuong cong ((tan chan) OR (ban chan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - thanh trung va phuong cong ((tan chan) OR (ban chan)) cao*.