Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
xa hanh » xa thanh, xa khanh, va hanh
nam tuc » nam thuc, nam truc, nam tu
dang ha » dong ha, dung ha, lang ha
dang xa » dang xay, lang xa, dang va
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) OR (doc sach)) y ((dang xa) or (dang ha)) hoi. thien van nam tuc xa hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) y ((dang xa) OR (dang ha)) hoi. thien van nam tuc xa hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) y ((dang xa) or (dang ha)) hoi. thien van nam tuc xa hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) y ((dang xa) or (dang ha)) hoi. thien van nam tuc xa hanh tai cua te*.