Perhaps you should try some spelling variations:
danh lai » danh sai, gianh lai, dinh lam
hieu van » hieu va, thien van, lieu va
chau tre » chay tren, chau tho, cho tre
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, xach tay
va danh » va dinh, va dan, va hanh
hieu ve » hieu va
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (hieu van)) coc luc va danh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) OR (hieu van)) coc luc va danh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (hieu van)) coc luc va danh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (hieu van)) coc luc va danh lai chau tre*.