Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
nam danh » nam dinh, nam dan
te sach » toc sach
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
cac oc » cac toc, cac hoc, cac o
oc nam » hoc nam, ngoc nam

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 thu nang xa hoi. ((lieu va) or (hieu qua)) cac oc nam danh ((vai cua) OR (lai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang xa hoi. ((lieu va) OR (hieu qua)) cac oc nam danh ((vai cua) OR (lai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu nang xa hoi. ((lieu va) or (hieu qua)) cac oc nam danh ((vai cua) OR (lai cua)) te*".