Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty lang » tay lang, ty xang, tu lang
ve cai » va cai, ve cac, ve tai
cuu va » cuu van, cuu ve
vai va » mai va, dai va, hai va
ve cap » ve cac, le cap, ve cau

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 lang) or (ty hang)) xa hoi. hieu ((ve cap) or (ve cai)) cuu va thanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (ty hang)) xa hoi. hieu ((ve cap) OR (ve cai)) cuu va thanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) or (ty hang)) xa hoi. hieu ((ve cap) or (ve cai)) cuu va thanh vai va triet*.