Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 sach - ((thanh trung) or (thanh tung)) va ((nhung cong) OR (dung cong)) san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((thanh trung) OR (thanh tung)) va ((nhung cong) OR (dung cong)) san than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((thanh trung) or (thanh tung)) va ((nhung cong) OR (dung cong)) san than cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((thanh trung) or (thanh tung)) va ((nhung cong) OR (dung cong)) san than cau*.