Perhaps you should try some spelling variations:
hieu cach » hieu cac, chieu sach, hieu ca
hanh bang » hanh mang, lanh bang, hanh trang
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
anh bang » anh hoang, anh quang, tinh bang
cong san » cong tac
than cau » toan cau, phan cau, than cap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - ((hanh bang) or (anh bang)) luan dung cong san ((than cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((hanh bang) OR (anh bang)) luan dung cong san ((than cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((hanh bang) or (anh bang)) luan dung cong san ((than cau) or (phan cac))*.