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

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) OR (hieu va)) cham xuc va danh ((lai va) or (hai va)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. ((hieu ve) OR (hieu va)) cham xuc va danh ((lai va) OR (hai va)) thieu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. ((hieu ve) OR (hieu va)) cham xuc va danh ((lai va) or (hai va)) thieu*".