Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
chat duc » chat xuc, chat doc, chet duoc
su sach » so sach, vu sach
tu nang » tru nang, tu nano, tu lang
tu nong » tu dong, tu cong, tu tong
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
duc van » duc va, duc tan, duc manh
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tu nang) or (tu nong)) o hoi. hieu ve chat duc van thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tu nong)) o hoi. hieu ve chat duc van thanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) or (tu nong)) o hoi. hieu ve chat duc van thanh dai cua triet*.