Perhaps you should try some spelling variations:
dau thuc » dan thuc, dai thuc, dam thuc
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
su sach » so sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
va dau » va dao
di cuu » di cua, dinh cuu
di cau » da cau, diem cau

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) or (vu sach)) ty nang xa hoi. lieu va dau thuc van hanh ((di cuu) OR (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. lieu va dau thuc van hanh ((di cuu) OR (di cau)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. lieu va dau thuc van hanh ((di cuu) OR (di cau)) tre*".