Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
cuu ban » cuu van, cua ban, cuu san
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
hoc cac » hoc cao
vi cua » vai cua, di cua
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: ((hoc sach) OR (hoc cac)) ky lang xa hoi. hieu va cham ((xuc ban) or (cuu ban)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ky lang xa hoi. hieu va cham ((xuc ban) OR (cuu ban)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) ky lang xa hoi. hieu va cham ((xuc ban) or (cuu ban)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) ky lang xa hoi. hieu va cham ((xuc ban) or (cuu ban)) hanh vi cua te*.