Perhaps you should try some spelling variations:
thanh trung » thanh tung
thuoc sach » hoc sach, nuoc sach, thuat sach
trung cap » truong cao, trung tam
dang cong » dung cong
van thanh » ban thanh, van tuan
hieu cua » hieu qua, dieu cua, bieu cua
cap dang » cao dang, cac dang, cap bang
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thuoc sach) or (hieu cua)) - thanh trung cap dang cong ((dan than) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuoc sach) OR (hieu cua)) - thanh trung cap dang cong ((dan than) OR (van thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thuoc sach) or (hieu cua)) - thanh trung cap dang cong ((dan than) or (van thanh)) cau*.