Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
lang xa » lang ha, lang van
sach v » sach va, sach y, sach 2
va cam » va cham, va cao, va cai
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de 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: toc sach v ((lang xa) OR (dang xay)) hoi. hieu ((va cam) or (va cac)) xuc va thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v ((lang xa) OR (dang xay)) hoi. hieu ((va cam) OR (va cac)) xuc va thanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v ((lang xa) OR (dang xay)) hoi. hieu ((va cam) or (va cac)) xuc va thanh di cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach v ((lang xa) OR (dang xay)) hoi. hieu ((va cam) or (va cac)) xuc va thanh di cua te*.