Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
va chay » va chat, va cham, va cay
dua ban » dia ban, cua ban, qua ban
danh va » doanh va, dan va, dang va
hanh va » hang va, hanh vi
su viet » so viet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. lieu va chay dua ban ((((danh va) or (anh va))) or (hanh va)) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. lieu va chay dua ban ((((danh va) OR (anh va))) OR (hanh va)) su viet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. lieu va chay dua ban ((((danh va) or (anh va))) or (hanh va)) su viet*.