Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
ve cham » va cham, ve chat, vu cham
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
y lang » o lang, _ lang, tay lang
vai su » va su, van su, lai su
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y lang ((mai hoi) or (dai hoi)). hieu ((ve cac) or (ve cham)) xuc ban thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang ((mai hoi) OR (dai hoi)). hieu ((ve cac) OR (ve cham)) xuc ban thanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y lang ((mai hoi) or (dai hoi)). hieu ((ve cac) or (ve cham)) xuc ban thanh vai su triet*.