Perhaps you should try some spelling variations:
chet triet » chuyen triet, thuyet triet
ban thanh » ban hanh, ban hang
thanh le » thinh le, thanh ve, thanh de
sach ky » sac ky, sach y, sach ty
le chet » la chet, se chet, le chien
xuc ban » duc ban, cuc ban, quoc ban
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
co hoi » co hoc, co loi
ro hoi » o hoi, mo hoi, ro doi
ve cam » ve cham, ve cac, ve cai

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 ((ro hoi) OR (co hoi)). hieu ((ve cam) or (va cam)) xuc ban thanh le chet triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ro hoi) OR (co hoi)). hieu ((ve cam) OR (va cam)) xuc ban thanh le chet triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ro hoi) OR (co hoi)). hieu ((ve cam) or (va cam)) xuc ban thanh le chet triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ro hoi) OR (co hoi)). hieu ((ve cam) or (va cam)) xuc ban thanh le chet triet*.