Perhaps you should try some spelling variations:
sach nham » sach nha, sach tham, sach han
nham nang » phap nang, cam nang, kha nang
trinh han » trinh quan
doc sach » hoc sach, toc sach, nuoc sach
va trinh » van trinh, va tinh, lap trinh
han cua » hang cua, nhan cua, than cua
cam luc » cau luc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
hieu va » lieu va, hieu qua
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach nham nang x hoi. ((hieu ve) OR (hieu va)) ((cam luc) OR (cam xuc)) va trinh han cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach nham nang x hoi. ((hieu ve) OR (hieu va)) ((cam luc) or (cam xuc)) va trinh han cua tre~".
• Adding a wildcard symbol may retrieve word variants: doc sach nham nang x hoi. ((hieu ve) OR (hieu va)) ((cam luc) or (cam xuc)) va trinh han cua tre*.