Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh lap » thanh san, phan lap, thanh hai
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thu hoach
suc van » su van, duc van, luc van
cao suc » cao su, cao duc
hieu ve » hieu va, hieu van
lap cua » lai cua, tap cua, lam cua
mai hoi » mai khoi, dai hoi, lai hoi
ve cao » va cao, ve bao, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuoc sach)) ky nang ((mai hoi) or (ma hoa)). hieu ve cao suc van thanh lap cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky nang ((mai hoi) OR (ma hoa)). hieu ve cao suc van thanh lap cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ky nang ((mai hoi) or (ma hoa)). hieu ve cao suc van thanh lap cua vat".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ky nang ((mai hoi) or (ma hoa)). hieu ve cao suc van thanh lap cua vat*.