Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau thuc » cuu thuc, can thuc, cau phuc
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
xang xa » lang xa, mang xa, ang xa
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
y xang » ty xang
va cau » van cau, va cac, 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: ((thu sach) or (te sach)) y xang xa hoi. lieu va ((cau thuc) or (cau truc)) va danh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) y xang xa hoi. lieu va ((cau thuc) OR (cau truc)) va danh va cau tren.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) y xang xa hoi. lieu va ((cau thuc) or (cau truc)) va danh va cau tren*.