Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
vai va » mai va, dai va, lai va
hai va » hai van, thai va, hoi va
thiet » thieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. ((hieu va) OR (lieu va)) cham xuc va hanh ((vai va) OR (hai va)) thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. ((hieu va) OR (lieu va)) cham xuc va hanh ((vai va) or (hai va)) thiet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. ((hieu va) OR (lieu va)) cham xuc va hanh ((vai va) or (hai va)) thiet*.