Perhaps you should try some spelling variations:
hoc sach » hoc cac, hoc anh
ban hanh » ban hang
cham xuc » cam xuc, chat xuc, cham soc
cua tre » cua te, cua triet, dua tren
xuc ban » duc ban, cuc ban, quoc ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc sinh)) ky lang xa hoi. hieu va cham xuc ban hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc sinh)) ky lang xa hoi. hieu va cham xuc ban hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) ky lang xa hoi. hieu va cham xuc ban hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc sinh)) ky lang xa hoi. hieu va cham xuc ban hanh vi ((cua tre) or (cuu tre))*.