Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
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
cua tre » cua te, cuu tre, cua triet
ca nam » cua nam, cai nam, va nam

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 ((ca nam) or (ha nam)) quan ((va thanh) or (ban thanh)) tinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ca nam) OR (ha nam)) quan ((va thanh) OR (ban thanh)) tinh cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((ca nam) or (ha nam)) quan ((va thanh) or (ban thanh)) tinh cua tre*.