Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tai cua » thai cua, tai cuc, tri cua
va lang » va nang, hoa lang
va hang » van hang, va nang, va hanh
cua tre » cua te, cuu tre, cua triet
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
va cau » van cau, va cac, va dau
le cau » ke cau, le mau, le cap
x hoi » xa hoi, o hoi, x ho

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