Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
dai thuc » dan thuc, dai thu, dai thua
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vai cau » va cau, van cau, vai cac
va dai » va dao, vi dai, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach thu)) nang xa hoi. lieu va dai thuc van hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach thu)) nang xa hoi. lieu va dai thuc van hanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach thu)) nang xa hoi. lieu va dai thuc van hanh vai cau tren*.