Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
toc sach » hoc sach, doc sach, thuoc sach
tru nang » tra nang, tri nang, truc nano
tuc ban » thuc ban, truc ban, tu ban
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
tu nang » tu nong, tu nano, tu lang
dai va » mai va

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)) ((tu nang) or (tru nang)) xa hoi. hieu va cac tuc ban thanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tu nang) OR (tru nang)) xa hoi. hieu va cac tuc ban thanh dai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((tu nang) or (tru nang)) xa hoi. hieu va cac tuc ban thanh dai va triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ((tu nang) or (tru nang)) xa hoi. hieu va cac tuc ban thanh dai va triet*.