Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thu nang » thi nang, thu hang, thu bang
su sach » so sach, vu sach
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
ke phan » ve phan, kenh phan, ke thang
va hanh » van hanh, va thanh, va danh
hanh ki » hanh vi, hanh ky, hanh kien
tu sach » thu sach, te sach, vu sach
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) or (tu cach))) or (su sach)) thu nang xa hoi. hieu ke phan tu va hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (su sach)) thu nang xa hoi. hieu ke phan tu va hanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (tu cach))) or (su sach)) thu nang xa hoi. hieu ke phan tu va hanh ki su triet*.