Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tham duc » pham duc, tham du, than duc
van hanh » ban hanh, van ban, van minh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va tham » van tham, va cham, va thanh
van anh » tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. lieu va tham duc ((((van hanh) OR (van thanh))) or (van anh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. lieu va tham duc ((((van hanh) OR (van thanh))) OR (van anh)) de cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. lieu va tham duc ((((van hanh) OR (van thanh))) or (van anh)) de cua tre*".