Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va dinh » van dinh, va kinh, va tinh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
hoc anh » hoc nganh, hoc nhanh, ngoc anh
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
di cua » doi cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc anh)) v nang x hoi. hieu va cam luc va dinh ((di cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc anh)) v nang x hoi. hieu va cam luc va dinh ((di cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc anh)) v nang x hoi. hieu va cam luc va dinh ((di cua) or (dai cua)) tre*.