Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dau tren » dat tren, dau tieng, dau trong
dau tien » van tien
su sach » so sach, vu sach
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
y mang » cay mang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y mang xa hoi. hieu va cac xuc van hanh vi ((dau tren) OR (dau tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y mang xa hoi. hieu va cac xuc van hanh vi ((dau tren) OR (dau tien))".
• Adding a wildcard symbol may retrieve word variants: su sach y mang xa hoi. hieu va cac xuc van hanh vi ((dau tren) OR (dau tien))*.