Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
dang van » hoang van, hang va
cuu thuc » cuu tac
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty dang » ty xang, ky dang, ty hang
hieu ve » hieu va, hieu van
tai cuu » tai cuc, tai buu, thai cua
tai cua » thai cua, tai cuc, tri cua
ve cuu » ve cau, ve chu, ve cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty dang van hoa. hieu ve cuu thuc dan thanh ((tai cuu) or (tai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty dang van hoa. hieu ve cuu thuc dan thanh ((tai cuu) OR (tai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty dang van hoa. hieu ve cuu thuc dan thanh ((tai cuu) or (tai cua)) tre*.