Perhaps you should try some spelling variations:
khai buoc » khai luoc, hai huoc, khac cuoc
hanh dien » nhanh dien, hang dien, danh dien
hieu van » hieu va, thien van, lieu va
van khai » van hai, van khi, dan khai
buoc ban » quoc ban, buon ban, duoc ban
ban hanh » ban hang
dien cua » dieu cua, dien cuc, dien cu
sach ky » sac ky, sach y, sach ty
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
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: te ((sach ky) or (sach tu)) nang x hoi. hieu van khai buoc ban hanh dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach tu)) nang x hoi. hieu van khai buoc ban hanh dien cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach tu)) nang x hoi. hieu van khai buoc ban hanh dien cua tre*.