Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
dang xay » dang van, van xay
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, hieu ly
thuc va » thuc vat, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (dang xay)) hoi. hieu le nam ((thuc va) or (thuc dan)) hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (dang xay)) hoi. hieu le nam ((thuc va) OR (thuc dan)) hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (dang xay)) hoi. hieu le nam ((thuc va) or (thuc dan)) hanh dai cua triet*.