Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
luat dan » luat dat, luat doanh, luat bao
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
cua dan » cua dang, cua ban, ca dan
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((xang xa) or (mang xa)) hoi. hieu ve cau ((luat dan) or (cua dan)) hang va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((xang xa) OR (mang xa)) hoi. hieu ve cau ((luat dan) OR (cua dan)) hang va cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((xang xa) or (mang xa)) hoi. hieu ve cau ((luat dan) or (cua dan)) hang va cau tren*.