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

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) OR (hieu va)) lam duc ban thanh toan ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu van) OR (hieu va)) lam duc ban thanh toan ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu van) OR (hieu va)) lam duc ban thanh toan ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu van) OR (hieu va)) lam duc ban thanh toan ((cua tre) or (cua triet))*.