Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc dieu
dung cong » dung trong
cong san » cong tac
san luan » dan luan, tang luan, hang luan
luan cau » quan cau, lua cau, luat cau
tung ap » tung dan, tung bay, tung mai
tang ap » tang van, tang tai, tang dan

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