Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
dua ban » dia ban, cua ban, qua ban
sach ty » sach y, sach tu, sach thu
duc ban » duc tan, duc van, duc man
ty nang » ky nang, ty xang, ty hang
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)) hanh lai ((cua triet) OR (cua viet))~.
• 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)) hanh lai ((cua triet) OR (cua viet)).
• 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)) hanh lai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu van cham ((duc ban) or (dua ban)) hanh lai ((cua triet) OR (cua viet))*.