Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
thanh de » hanh de, thanh ve, thanh do
vu sach » vu bach, su sach, vu khach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam
de cua » le cua, te cua, dieu cua
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: vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve nam thuc dan thanh de cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve nam thuc dan thanh de cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve nam thuc dan thanh de cua te*.