Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cua triet » cua viet, su triet, va triet
thuc van » thuc vat, thuc dan, thuc va
doanh va » doan va, doanh tai, doanh cua
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
va cua » va chua, via cua, ca cua
o hai » co hai, so hai, o lai
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sac ky)) nang o hai. hieu ve am thuc van doanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) nang o hai. hieu ve am thuc van doanh va cua triet*.