Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thu sach » tu sach, thuat sach, thuoc sach
hang via » hang va, hang vi, hang giao
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
duc ban » duc van, dua ban, duc man
y nang » ky nang, ly nang, v nang
ve cao » va cao, ve bao, ve cac
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: thu sach y nang x hoi. hieu ve cao ((duc ban) or (duc tan)) hang via ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ve cao ((duc ban) OR (duc tan)) hang via ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cao ((duc ban) or (duc tan)) hang via ((cua triet) OR (va triet))*".