Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
va danh » va dinh, va dan, va hanh
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang ((xa hoi) or (ma hoa)). hieu van chat xuc va danh dai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ((xa hoi) OR (ma hoa)). hieu van chat xuc va danh dai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ((xa hoi) or (ma hoa)). hieu van chat xuc va danh dai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ((xa hoi) or (ma hoa)). hieu van chat xuc va danh dai ((cua tre) OR (cua te))*.