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