Perhaps you should try some spelling variations:
thien van » thi van
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
sach kem » hanh kem
nam duoc » nam thuoc, da duoc, dat duoc
duoc gia » duoc giao, quoc gia, duc gia
sach ky » sach y, sach ty, sach hay
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
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: tu ((((sach ky) or (sach kem))) or (sac ky)) nang o hoi. thien van nam duoc gia thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach kem))) OR (sac ky)) nang o hoi. thien van nam duoc gia thanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach kem))) or (sac ky)) nang o hoi. thien van nam duoc gia thanh dai cua triet*.