Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
va thanh » gia thanh, va tinh, le thanh
cac luc » cau luc, coc luc, cac nuoc
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
xang xa » mang xa, ang xa, dang xay
cua tuc » cua duc, cua tu, cua thuoc
tu cua » hu cua, vu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((xang xa) or (lang xa)) hoi. hieu vien cac luc ((va thanh) or (ban thanh)) tu cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((xang xa) OR (lang xa)) hoi. hieu vien cac luc ((va thanh) OR (ban thanh)) tu cua tuc.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((xang xa) or (lang xa)) hoi. hieu vien cac luc ((va thanh) or (ban thanh)) tu cua tuc*.