Perhaps you should try some spelling variations:
van phong » van dong, hai phong
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tinh cua » trinh cua, sinh cua, tinh chat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet

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 xa hoi. hieu van cac xuc ((van phong) or (van hanh)) tinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van cac xuc ((van phong) OR (van hanh)) tinh cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van cac xuc ((van phong) or (van hanh)) tinh cua tre*.