Perhaps you should try some spelling variations:
tthanh trung » thanh tung, thanh trang, hanh trang
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong van » cong vang, cong san, song van
tuan cao » toan cao, quang cao, thuan cam
juan cao » quang cao, toan cao, quan cau

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