Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hanh dai » hanh tai, hanh dao, vanh dai
vat hanh » vat thanh, van hanh, va hanh
hien cac » thien cac, vien cac, hieu cac
hoc vat » hoc va, hoc viet, thuc vat
cac hoc » cach hoc, cac hop, bac hoc
su sach » so sach
nang xa » nang x, nang ma, mang xa
vu sach » vu bach, vu khach
lang xa » lang ha, dang xay, lang van

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 (vu sach)) ky ((nang xa) or (lang xa)) hoi. hieu hien cac hoc vat hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu hien cac hoc vat hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky ((nang xa) or (lang xa)) hoi. hieu hien cac hoc vat hanh dai cua triet*.