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
danh vai » danh sai, danh va, doanh van
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cac oc » cac toc, cac hoc, cac o
oc nam » hoc nam, ngoc nam
cua tu » cua tuc, cua su, cua cu

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 te) OR (cua tu))~.
• 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 te) OR (cua tu))*.
• 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 te) OR (cua tu))*".