Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kho lang » kho tang, cho lang, tho lang
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh dan » thanh dan, hanh san, canh dan
su sach » vu sach
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
dan cua » dan ca, ban cua, dai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) kho lang xa hoi. hieu van nam thuc van hanh dan cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) kho lang xa hoi. hieu van nam thuc van hanh dan cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) kho lang xa hoi. hieu van nam thuc van hanh dan cua triet*.