Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky song » k song, ky cong, ky trong
song xa » song cua
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
cua tre » cuu tre, cua triet, dua tren
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 song xa hoi. ((hieu ve) or (hieu qua)) cam xuc van hanh thai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky song xa hoi. ((hieu ve) OR (hieu qua)) cam xuc van hanh thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky song xa hoi. ((hieu ve) or (hieu qua)) cam xuc van hanh thai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky song xa hoi. ((hieu ve) or (hieu qua)) cam xuc van hanh thai ((cua tre) OR (cua te))*.