Perhaps you should try some spelling variations:
te sach » toc sach
xay hoi » tay hoi, cay phoi, gay thoi
hieu ve » hieu va, hieu van
duc ban » duc van, dua ban, duc man
anh hai » lanh hai, manh hai, anh thai
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
ve cac » va cac, vien 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 y dang ((xay hoi) or (xa hoi)). hieu ve cac ((duc ban) or (duc tan)) anh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang ((xay hoi) OR (xa hoi)). hieu ve cac ((duc ban) OR (duc tan)) anh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y dang ((xay hoi) or (xa hoi)). hieu ve cac ((duc ban) or (duc tan)) anh hai cua tre*.