Perhaps you should try some spelling variations:
doc chinh » hoc chinh, do chinh, doi chinh
tung tuan » trung tuan, quang tuan, trang tuan
hung tuan » hung tran, quang tuan, trung tuan
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chinh sach - thanh ((tung tuan) or (hung tuan)) hang cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chinh sach - thanh ((tung tuan) OR (hung tuan)) hang cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: doc chinh sach - thanh ((tung tuan) or (hung tuan)) hang cong dan chan cau*.