Perhaps you should try some spelling variations:
quoc ban » quoc bao, quoc lan, quoc quan
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, xuat ban
hanh di » hanh vi, hanh de, hang di
sang ky » sang kyo, dang ky, tang ky
tang ma » mang may, tang van
va chat » van chat, va phat, cao chat
di cua » dai cua, doi cua, de cua
san ky » van ky, dan ky, ban ky
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) or (sang ky)) tang ma hoi. hieu va chat ((xuc ban) or (quoc ban)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) tang ma hoi. hieu va chat ((xuc ban) OR (quoc ban)) hanh di cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) or (sang ky)) tang ma hoi. hieu va chat ((xuc ban) or (quoc ban)) hanh di cua te*.