Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
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 » lieu va, hieu qua
va cham » va chat, va tham
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » tuc va, luc va, xac va
vai va » mai va, dai va, hai va
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 va cham ((xuc va) OR (duc va)) hanh vai va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu va cham ((xuc va) OR (duc va)) hanh vai va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu va cham ((xuc va) OR (duc va)) hanh vai va thiet*.