Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
thanh cac » hanh cac, thanh bac, thanh ca
cong cap » cung cap, cong cau, cong cac
cap dung » ap dung, cao dung, chan dung
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (chieu sach)) - thanh cong cap dung cong san ((phan cau) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - thanh cong cap dung cong san ((phan cau) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - thanh cong cap dung cong san ((phan cau) or (thanh cac))*.