Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu cua » hieu qua, dieu cua, bieu cua
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
thuc va » thuc vat, thuc dan, thuc day
cua am » cua tam, cua nam, cua dam
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va

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 ((lang xa) or (dang xay)) hoi. hieu cua am thuc va dan va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (dang xay)) hoi. hieu cua am thuc va dan va su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (dang xay)) hoi. hieu cua am thuc va dan va su triet*.