Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hang » ngan hang
tu cach » tu cac
hieu va » lieu va, hieu qua
hang vi » hang va, hanh vi, hang di
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di 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 cach) or (thu sach)) ky nang xa hoi. ((hieu ve) or (hieu va)) cac xuc ban hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cac xuc ban hang vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky nang xa hoi. ((hieu ve) or (hieu va)) cac xuc ban hang vi cua tre*.