Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh di » thanh doi, thanh de, thanh do
hieu voi » hieu moi, lieu voi, hieu loi
voi pham » vi pham, toi pham, loai pham
nang tao » nang cao, sang tao, nang tai
tao hoi » tao khoi, tao boi, tay hoi
duy ban » uy ban, duy can, dua ban
duy van » duy vat, dung van
bo sach » co sach, hoc sach
tu cach » tu cac
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 cach) or (bo sach)) ky nang tao hoi. hieu voi pham ((duy ban) OR (duy van)) thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (bo sach)) ky nang tao hoi. hieu voi pham ((duy ban) OR (duy van)) thanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (bo sach)) ky nang tao hoi. hieu voi pham ((duy ban) OR (duy van)) thanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (bo sach)) ky nang tao hoi. hieu voi pham ((duy ban) OR (duy van)) thanh di cua triet*.