Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
van thanh » ban thanh, van tuan
trung va » truong va, trang va, trung ha
dan chan » dan gian, dan ca, van chat

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

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