Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
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: ((thu sach) OR (thuat 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: ((thu sach) OR (thuat sach)) ty nang ma hoi. hieu ((van cac) OR (van cau)) dat va thanh di cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat 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: ((thu sach) OR (thuat sach)) ty nang ma hoi. hieu ((van cac) or (van cau)) dat va thanh di cua vat*.