Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va hanh » van hanh, va thanh, va danh
cau duc » cao duc, cau luc, chu duc
hieu ve » hieu va, hieu van
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
ve cau » ke cau, va cau, ve cac
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 lo nang ((x hoi) OR (o hoi)). hieu ve cau duc va hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach lo nang ((x hoi) OR (o hoi)). hieu ve cau duc va hanh ((vai cua) OR (lai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach lo nang ((x hoi) OR (o hoi)). hieu ve cau duc va hanh ((vai cua) or (lai cua)) tre*".