Perhaps you should try some spelling variations:
quoc ban » quoc bao, quoc lan, quoc quan
thu sac » thu sach, thu san, thu xac
hang vi » hang va, hanh vi, hang di
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
lang xa » dang xay, lang van
lang ha » long ha
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky ((lang xa) or (lang ha)) hoi. lieu va cam ((cuc ban) or (quoc ban)) hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((lang xa) OR (lang ha)) hoi. lieu va cam ((cuc ban) OR (quoc ban)) hang vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((lang xa) or (lang ha)) hoi. lieu va cam ((cuc ban) or (quoc ban)) hang vi cua tre*.