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

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

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