Perhaps you should try some spelling variations:
dau thuc » dan thuc, dai thuc, dam thuc
van hanh » van thanh, ban hanh, van ban
dinh cuu » dinh chi
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van anh » van thanh, tuan anh, van minh
va dau » va dao
di cuu » di cau, di 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 nang xa hoi. lieu va dau thuc ((van hanh) or (van anh)) ((di cuu) OR (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va dau thuc ((van hanh) OR (van anh)) ((di cuu) OR (dinh cuu)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va dau thuc ((van hanh) or (van anh)) ((di cuu) OR (dinh cuu)) tre*".