Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, thanh san
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, ma hoa, me hoi
ky anh » ky danh, ly anh, ty anh
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 ky anh ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((thanh tai) OR (doanh tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky anh ((ma hoi) OR (xa hoi)). hieu ve cac xuc va ((thanh tai) OR (doanh tai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky anh ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((thanh tai) OR (doanh tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky anh ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((thanh tai) OR (doanh tai)) cuu tre*.