Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
thanh hang » thanh hoang, thanh thang, tranh hang
hieu cach » hieu cac, chieu sach, hieu ca
ca trong » cay trong, cad trong, co trong
cong tac » cong ty
doan cap » doanh cao, toan cao, doan va
hang ca » hang va, nang cao, hang tai

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 (hieu cach)) - thanh hang ca trong cong tac ((doan cap) or (dan ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - thanh hang ca trong cong tac ((doan cap) OR (dan ca)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cach)) - thanh hang ca trong cong tac ((doan cap) or (dan ca))*.