Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
ban thanh » ban hanh, ban hang
thanh de » hanh de, thanh ve, thanh do
de chat » de phat, ve chat, du chat
xuc ban » duc ban, cuc ban, quoc ban
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang ro » nang ho, nang ra, nang rong
nang co » nang cao, nang doc, nang noi
ve cac » va cac, vien cac
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 ty ((nang ro) or (nang co)) hoi. hieu ((ve cac) or (va cam)) xuc ban thanh de chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang ro) OR (nang co)) hoi. hieu ((ve cac) OR (va cam)) xuc ban thanh de chat triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang ro) or (nang co)) hoi. hieu ((ve cac) or (va cam)) xuc ban thanh de chat triet*.