Perhaps you should try some spelling variations:
chet triet » chuyen triet, thuyet triet
thanh de » hanh de, thanh ve, thanh do
thanh le » thinh le, thanh ve, thanh liem
xuc ban » duc ban, cuc ban, quoc ban
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
ve cai » va cai, ve cac, ve tai
ro hoi » co hoi, o hoi, mo hoi
va cam » va cham, va cac, va cao

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