Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
xuc van » duc van, luc van, vuc van
cua tre » cuu tre, cua triet, dua tren
va cam » va cham, va cac, va cao
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. lieu va cam xuc van hanh vi ((dau tren) or (((cua tre) OR (cua te))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. lieu va cam xuc van hanh vi ((dau tren) OR (((cua tre) OR (cua te))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. lieu va cam xuc van hanh vi ((dau tren) or (((cua tre) OR (cua te))))*".