Perhaps you should try some spelling variations:
thien van » thi van
ban hanh » ban hang
hanh le » thanh le, hanh ve, hanh de
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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 y)) nang x hoi. ((hieu ve) or (thien van)) cam duc ban hanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. ((hieu ve) OR (thien van)) cam duc ban hanh le cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang x hoi. ((hieu ve) or (thien van)) cam duc ban hanh le cua tre*.