Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban 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
ve cau » ke cau, ve cac, le cau
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 ((ve cau) or (va cau)) duc ((va hanh) OR (va thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach lo nang x hoi. hieu ((ve cau) OR (va cau)) duc ((va hanh) OR (va thanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach lo nang x hoi. hieu ((ve cau) or (va cau)) duc ((va hanh) OR (va thanh)) vai cua tre*".