Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc 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: te sach ky nang ma hoi. hieu va cham ((xuc va) OR (luc va)) ((hanh vai) or (hanh vi)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu va cham ((xuc va) OR (luc va)) ((hanh vai) OR (hanh vi)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu va cham ((xuc va) OR (luc va)) ((hanh vai) or (hanh vi)) va thiet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va cham ((xuc va) OR (luc va)) ((hanh vai) or (hanh vi)) va thiet*.