Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » thien van, lieu va, hieu ve
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ly ban » uy ban, lo ban, ly bai
cac ly » cac ky, cac le, cam ly

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. ((hieu va) or (hieu van)) cac ly ban ((thanh vai) or (thanh tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. ((hieu va) OR (hieu van)) cac ly ban ((thanh vai) OR (thanh tai)) va triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. ((hieu va) or (hieu van)) cac ly ban ((thanh vai) or (thanh tai)) va triet*.