Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tan hanh » tan thanh, tang hanh, toan hanh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hanh di » hanh vi, hanh de, hang di
tu ban » thu ban, te ban
ban ky » van ky, dan ky
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: tu ban ky ((nang xa) OR (nang ma)) hoi. hieu van pham duc tan hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky ((nang xa) OR (nang ma)) hoi. hieu van pham duc tan hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((nang xa) OR (nang ma)) hoi. hieu van pham duc tan hanh di cua triet*.