Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
quang dung » quang trung, ung dung
cuong dung » tuong duong, ung dung, thong dung
trong dung » thong dung, trung dung, trong rung
dung doanh » dung dan, dung dong
tieu sach » dien sach, te sach, viet sach
doanh cao » doanh co, doanh bao, doanh cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu sach) OR (chieu sach)) - hanh trung ((quang dung) or (cuong dung)) trong dung doanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (chieu sach)) - hanh trung ((quang dung) OR (cuong dung)) trong dung doanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) OR (chieu sach)) - hanh trung ((quang dung) or (cuong dung)) trong dung doanh cao".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) OR (chieu sach)) - hanh trung ((quang dung) or (cuong dung)) trong dung doanh cao*.