Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
can thuc » dan thuc, van thuc, cay thuc
thanh va » thanh van, hanh va, thanh ha
cau thuc » cau truc, cuu thuc, cau phuc
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang o » nang co, nang ho, nang ro
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 o hoi. hieu va ((cau thuc) or (can thuc)) ban thanh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoi. hieu va ((cau thuc) OR (can thuc)) ban thanh va ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoi. hieu va ((cau thuc) or (can thuc)) ban thanh va ((cua tre) or (cua triet))*.