Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh vai » hanh vi, hanh tai, hanh van
sach lo » sach dao, sach doi, sach hoi
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
lo nang » ho nang, ly nang, loai nang
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
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 vai) OR (hanh va)) 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 vai) OR (hanh va)) 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 vai) OR (hanh va)) cua tre*".