Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
cam tuc » cam xuc, cam tu, nam thuc
nang ma » tang ma, sang ma, nang cao
hoi cua » hoi chuc
hieu ve » hieu van
doi cua » dai cua
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
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) OR (hieu va)) cam tuc 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) OR (hieu va)) cam tuc 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) OR (hieu va)) cam tuc va thanh ((doi cua) or (hoi cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. ((hieu ve) OR (hieu va)) cam tuc va thanh ((doi cua) or (hoi cua)) te*.