Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
hoi cua » hoi chuc
hieu ve » hieu va, hieu van
doi cua » dai cua
cam tuc » cam tu, nam thuc, dam thuc
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) va thanh ((doi cua) or (hoi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) va thanh ((doi cua) OR (hoi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) va thanh ((doi cua) or (hoi cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) va thanh ((doi cua) or (hoi cua)) te*.