Perhaps you should try some spelling variations:
hanh duoc » hanh thuoc, nganh duoc, doanh duoc
hieu ban » hieu van, dieu ban, lieu ban
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
duoc va » nuoc va, duc va, duoc ma
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua
x hoi » o hoi, x ho, 5 hoi

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 ((x hoi) or (xa hoi)). hieu ban hanh duoc va thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang ((x hoi) OR (xa hoi)). hieu ban hanh duoc va thanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach tu nang ((x hoi) or (xa hoi)). hieu ban hanh duoc va thanh ve cua tre*.