Perhaps you should try some spelling variations:
anh thai » anh thi, anh tai, nhanh thai
te sach » toc sach
cao duc » dao duc, cao suc, giao duc
anh hai » lanh hai, manh hai, anh bai
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xay hoi » tay hoi, cay phoi, gay thoi
ky anh » ky danh, ly anh, ty anh
ve cao » va cao, ve bao, ve cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky anh ((xay hoi) OR (xa hoi)). hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky anh ((xay hoi) OR (xa hoi)). hieu ve cao duc ban ((anh hai) OR (anh thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky anh ((xay hoi) OR (xa hoi)). hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky anh ((xay hoi) OR (xa hoi)). hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre*.