Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
y lang » o lang, _ lang, tay lang

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

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