Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
hanh moi » thanh moi, hanh noi, hanh mot
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
moi cua » hoi cua, doi cua, moi quan
tu sach » thu sach, te sach, tu cach
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: ((tu sach) OR (su sach)) y ((nang xa) or (lang xa)) hoi. hieu ve nam thuc va hanh moi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y ((nang xa) OR (lang xa)) hoi. hieu ve nam thuc va hanh moi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y ((nang xa) or (lang xa)) hoi. hieu ve nam thuc va hanh moi cua triet*".