Perhaps you should try some spelling variations:
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
san cau » van cau, ban cau, can cau
hieu ve » hieu va, hieu van
su sach » so sach
hang xa » hoang xa, hang ca, lang xa
vu sach » vu bach, vu khach
ve nam » he nam, va nam, le nam

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