Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ve cac ky ((va hanh) or (gia thanh)) vai ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ve cac ky ((va hanh) OR (gia thanh)) vai ((cua tre) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve cac ky ((va hanh) or (gia thanh)) vai ((cua tre) or (ve triet))*.