Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
ban thanh » ban hanh
hoc sach » hoc sinh, hoc cac, hoc anh
ban hang » ngan hang
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
v nang » va nang, vu nang, van nang
ve cua » le cua, de cua, te cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (hoc sach)) v nang xa hoi. hieu va cam luc ((ban thanh) or (ban hang)) ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) v nang xa hoi. hieu va cam luc ((ban thanh) OR (ban hang)) ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) v nang xa hoi. hieu va cam luc ((ban thanh) or (ban hang)) ve cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) v nang xa hoi. hieu va cam luc ((ban thanh) or (ban hang)) ve cua tre*.