Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
tan thanh » tran thanh, tang thanh, toan thanh
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
nong xa » song xa, dong xa, nong va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
nong x » nang x, nong e, nong o

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

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