Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » van thanh, ban hanh, van anh
sinh cua » manh cua, dinh cuu, sinh va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
viec da » viec dat, vien da, viec va
cua tre » cua te, cuu tre, cua triet
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 ky nang ma hoi. hieu viec da xuc ((ban thanh) or (van hanh)) sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu viec da xuc ((ban thanh) OR (van hanh)) sinh cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu viec da xuc ((ban thanh) or (van hanh)) sinh cua tre*.