Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
ve cam » ve cham, ve cac, va cam
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 ky) or (sach y)) nang x hoi. hieu ve cam xuc van hanh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang x hoi. hieu ve cam xuc van hanh vi ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach y)) nang x hoi. hieu ve cam xuc van hanh vi ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach y)) nang x hoi. hieu ve cam xuc van hanh vi ((cua triet) OR (va triet))*.