Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh vai » thanh hai, thanh van, thanh tai
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, dang xay
cua tuc » cua duc, cua thuoc, luat tuc
ang xa » lang xa, mang xa, dang xay
va nam » van nam, ha nam, va nay
cua tu » cua su, cua cu, cua te

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 ((xang xa) OR (ang xa)) hoi. lieu va nam thuc dan thanh vai ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang xa) OR (ang xa)) hoi. lieu va nam thuc dan thanh vai ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((xang xa) OR (ang xa)) hoi. lieu va nam thuc dan thanh vai ((cua tu) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((xang xa) OR (ang xa)) hoi. lieu va nam thuc dan thanh vai ((cua tu) or (cua tuc))*.