Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
toc sach » hoc sach, doc sach, thuoc sach
lang hoa » hang hoa, lang ha, nang hoa
thu van » thuc van, thuy van, tu van
hieu ve » hieu va, hieu van
hoa doi » hoa dai, hoc doi, xoa doi
ky lang » ky nang, ky dang, ky tang
hieu le » hieu he, hieu ly, tieu le
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ky lang hoa doi. ((hieu le) or (hieu ve)) nam thu van thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky lang hoa doi. ((hieu le) OR (hieu ve)) nam thu van thanh vai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky lang hoa doi. ((hieu le) or (hieu ve)) nam thu van thanh vai su triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky lang hoa doi. ((hieu le) or (hieu ve)) nam thu van thanh vai su triet*.