Perhaps you should try some spelling variations:
ban hang » ngan hang
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
di cua » dai cua, doi cua, de cua

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) or (cac ky)) nang xa hoi. hieu ve cam xuc ((ban hang) or (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) nang xa hoi. hieu ve cam xuc ((ban hang) OR (va danh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (cac ky)) nang xa hoi. hieu ve cam xuc ((ban hang) or (va danh)) di cua tre*.