Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
loai nang » loai nam, luan nang, dai nang
loai san » tai san, loai nam, loai va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau duc » cao duc, cau luc, chu duc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ve cau » ke cau, va cau, ve cac
x hoi » o 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 ((loai nang) or (loai san)) ((x hoi) OR (xa hoi)). hieu ve cau duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((loai nang) OR (loai san)) ((x hoi) OR (xa hoi)). hieu ve cau duc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((loai nang) or (loai san)) ((x hoi) OR (xa hoi)). hieu ve cau duc va hanh vai cua tre*".