Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nam thuc » nam thuoc, am thuc, nam thu
thi hanh » thi thanh
hanh ma » hanh mau, hanh may, anh ma
hanh la » hanh lam, hang la, thanh lap
thuc va » thuc vat, thuc dan, thuc day
tu cach » tu cac
hieu he » hieu ve, hiem he, hieu le
hanh va » hang va, hanh vi
te sach » toc sach
va hoi » xa hoi, va hoc, va hoa
he nam » ha nam, nghe 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 cach) or (te sach)) thi hanh va hoi. hieu he nam thuc va ((hanh la) or (hanh ma)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) thi hanh va hoi. hieu he nam thuc va ((hanh la) OR (hanh ma)) ve triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) thi hanh va hoi. hieu he nam thuc va ((hanh la) or (hanh ma)) ve triet*.