Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
ve triet » va trien, su triet
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
ma hoi » mai hoi, ma hoa, me hoi
vai ve » va ve, dai ve, vai va

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 _ sang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (ve cac)) xuc van thanh vai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ sang ((ma hoi) OR (xa hoi)). hieu ((ve cam) OR (ve cac)) xuc van thanh vai ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach _ sang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (ve cac)) xuc van thanh vai ve triet*.