Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
cuc ban » cua ban, cac ban, cuu ban
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sai ky » sac ky
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky sang ma hoa. hieu ve chat ((cuc ban) or (quoc ban)) hanh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky sang ma hoa. hieu ve chat ((cuc ban) OR (quoc ban)) hanh vi ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky sang ma hoa. hieu ve chat ((cuc ban) or (quoc ban)) hanh vi ((cua triet) OR (va triet))*".