Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
xay thanh » day thanh, giay thanh, ngay thanh
nam thuc » nam thuoc, am thuc, nam thu
cau tren » dau tren, ca tren, cau treo
thuc xay » thuc day, tuc xay, thuat xay
su sach » so sach, vu sach
cu tren » tu tren, dua tren
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang ca, lang xa
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 ty ((hang xa) or (hang va)) hoi. hieu ve nam thuc xay thanh ban ((cau tren) OR (cu 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 nam thuc xay thanh ban ((cau tren) OR (cu 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 nam thuc xay thanh ban ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((hang xa) or (hang va)) hoi. hieu ve nam thuc xay thanh ban ((cau tren) OR (cu tren))*.