Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
toan cua » than cua, tan cua, doanh cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, 5 hoi
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: su sach ky nang ((((x hoi) or (x ho))) or (o hoi)). hieu van lam duc ban thanh toan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((((x hoi) OR (x ho))) OR (o hoi)). hieu van lam duc ban thanh toan cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((((x hoi) or (x ho))) or (o hoi)). hieu van lam duc ban thanh toan cua tre*.