Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
vi can » voi can, vi van, ki can
i can » ki can, c can, i ban

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