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