Perhaps you should try some spelling variations:
sach tay » xach tay, sach nay, sach tai
sach hay » sach han, sach ha, sach nay
gian cua » gian xu, ban cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh
cac lo » cac lop, cac co, cac bo
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach tay) OR (sach hay)) lang xa hoi. hieu va cac lo ((van anh) OR (van minh)) gian cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach tay) OR (sach hay)) lang xa hoi. hieu va cac lo ((van anh) or (van minh)) gian cua tu~".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach tay) OR (sach hay)) lang xa hoi. hieu va cac lo ((van anh) or (van minh)) gian cua tu*.