Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
san cua » sang cua, ban cua, dan cua
hieu ve » hieu va
ta hoi » tao hoi, tay hoi, tai hoi
anh ta » anh tu, anh va, anh tuan
ky anh » ky danh, ly anh, ty anh
xu van » tu van, vu van, su van
su can » su van, tu can, su han
su cao » cu cao, vu cao, su co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cao) or (su can)) ky anh ta hoi. ((hieu ve) or (hieu van)) chao xu van thanh san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cao) OR (su can)) ky anh ta hoi. ((hieu ve) OR (hieu van)) chao xu van thanh san cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su cao) or (su can)) ky anh ta hoi. ((hieu ve) or (hieu van)) chao xu van thanh san cua tre*.