Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
ban thanh » ban hanh, ban hang
dua tren » dung tren
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
su sach » so sach, vu sach

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 xa hoi. hieu van lam duc ban thanh toan ((((dua tren) or (cuu tre))) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van lam duc ban thanh toan ((((dua tren) OR (cuu tre))) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu van lam duc ban thanh toan ((((dua tren) or (cuu tre))) or (cua viet))*.