Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
dua ban » cua ban, qua ban, mua ban
lai cua » dai cua, hai cua, lai chau
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
duc ban » duc tan, duc van, duc man
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu van cham ((duc ban) or (((dua ban) OR (dia ban)))) hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu van cham ((duc ban) OR (((dua ban) OR (dia ban)))) hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu van cham ((duc ban) or (((dua ban) OR (dia ban)))) hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu van cham ((duc ban) or (((dua ban) OR (dia ban)))) hanh lai cua triet*.