Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
nam thue » nam thu, nam thuc, lam thue
bo sach » co sach, hoc sach
hieu ve » hieu va, hieu van
thue va » thuc va, thuyet va, thuc vat
va dang » van dang, va nang, va lang
dang de » dang deo, dung de, dang do
cua tuc » cua duc, cua tu, cua thuoc
ve nam » he nam, va nam, le nam
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach tay lang ((xa hoi) or (ha noi)). hieu ve nam thue va dang de cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach tay lang ((xa hoi) OR (ha noi)). hieu ve nam thue va dang de cua tuc.
• Adding a wildcard symbol may retrieve word variants: bo sach tay lang ((xa hoi) or (ha noi)). hieu ve nam thue va dang de cua tuc*.