Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dan thanh » dang thanh, danh thanh, van thanh
thien van » thi van
cam thuc » am thuc, nam thuc, cam thu
so sach » bo sach, co sach, hoc sach
doi cua » dai cua, hoi cua
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
so sanh » do sanh
y lang » o lang, _ lang, tay lang
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) y lang xa hoi. thien van cam thuc ((dan thanh) OR (ban thanh)) doi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y lang xa hoi. thien van cam thuc ((dan thanh) OR (ban thanh)) doi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) y lang xa hoi. thien van cam thuc ((dan thanh) OR (ban thanh)) doi cua su".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) y lang xa hoi. thien van cam thuc ((dan thanh) OR (ban thanh)) doi cua su*.