Perhaps you should try some spelling variations:
thanh dan » thanh san, thanh van, thanh dat
ky danh » ky anh, ky dang
hoa doi » hoa dai, hoc doi, xoa doi
hoc dai » hoc dan
hieu ve » hieu va, hieu van
ve chao » ve chat, ve cham, ve cho
dan cua » dan ca, ban cua, dai cua
cua tre » cua te, cuu tre, cua triet
xu van » vu van, su van
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: cu cao ky danh ((hoa doi) or (hoc dai)). hieu ve chao ((xu van) or (tu van)) thanh dan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cu cao ky danh ((hoa doi) OR (hoc dai)). hieu ve chao ((xu van) OR (tu van)) thanh dan cua tre.
• Adding a wildcard symbol may retrieve word variants: cu cao ky danh ((hoa doi) or (hoc dai)). hieu ve chao ((xu van) or (tu van)) thanh dan cua tre*.