Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
xay thanh » day thanh, giay thanh, ngay thanh
cau tren » cu tren, dau tren, ca tren
thuc xay » thuc day, tuc xay, thuat xay
nam thuc » nam thuoc, am thuc, nam thu
hieu va » lieu va, hieu qua
ban cau » bang cau, ban can, van cau
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
hang xa » hoang xa, hang ca, lang xa

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 ((hang xa) or (hang va)) hoi. ((hieu ve) OR (hieu va)) nam thuc xay thanh ban cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((hang xa) OR (hang va)) hoi. ((hieu ve) OR (hieu va)) nam thuc xay thanh ban cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((hang xa) or (hang va)) hoi. ((hieu ve) OR (hieu va)) nam thuc xay thanh ban cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((hang xa) or (hang va)) hoi. ((hieu ve) OR (hieu va)) nam thuc xay thanh ban cau tren*.