Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc gia » luoc gia, duc gia, quoc gia
vai cua » hai cua, lai cua, bai cua
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tham nang ((x hoi) OR (o hoi)). hieu va cham luc gia thanh ((vai cua) or (dai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tham nang ((x hoi) OR (o hoi)). hieu va cham luc gia thanh ((vai cua) OR (dai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham nang ((x hoi) OR (o hoi)). hieu va cham luc gia thanh ((vai cua) or (dai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: te sach tham nang ((x hoi) OR (o hoi)). hieu va cham luc gia thanh ((vai cua) or (dai cua)) tu*.