Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
bo sach » co sach, hoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
thuc va » thuc vat, thuc dan, thuc day
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (bo sach)) ky dang xa hoi. hieu van nam thuc va hang di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (bo sach)) ky dang xa hoi. hieu van nam thuc va hang di cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (bo sach)) ky dang xa hoi. hieu van nam thuc va hang di cua triet*.