Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (tu sach)) ty nang ma hoi. hieu ((van cac) or (van cau)) dat va thanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (tu sach)) ty nang ma hoi. hieu ((van cac) OR (van cau)) dat va thanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (tu sach)) ty nang ma hoi. hieu ((van cac) or (van cau)) dat va thanh di cua vat*.