Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
nam danh » nam dinh, nam dan
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cac toc » cac toi, cac nuoc, cac thoi
toc nam » hoc nam, oc nam, goc nam
lai cua » dai cua, hai cua, thai cua

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: te sach tham nang xa hoi. ((hieu va) OR (hieu qua)) cac toc nam danh ((lai cua) OR (lai chau)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham nang xa hoi. ((hieu va) or (hieu qua)) cac toc nam danh ((lai cua) OR (lai chau)) te~".
• Adding a wildcard symbol may retrieve word variants: te sach tham nang xa hoi. ((hieu va) or (hieu qua)) cac toc nam danh ((lai cua) OR (lai chau)) te*.