Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
hoc anh » hoc nganh, hoc nhanh, ngoc anh
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 anh)) ky tang xa hoi. hieu va cham ((xuc ban) or (duc ban)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ky tang xa hoi. hieu va cham ((xuc ban) OR (duc ban)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc anh)) ky tang xa hoi. hieu va cham ((xuc ban) or (duc ban)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc anh)) ky tang xa hoi. hieu va cham ((xuc ban) or (duc ban)) hanh vi cua te*.