Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cao » van dao, van bao, van hao
cao duc » dao duc, cao suc, giao duc
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cua te » cua tu

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) or (so sach)) ky nang xa hoi. hieu van cao duc va ((thanh vai) OR (thanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky nang xa hoi. hieu van cao duc va ((thanh vai) OR (thanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ky nang xa hoi. hieu van cao duc va ((thanh vai) OR (thanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang xa hoi. hieu van cao duc va ((thanh vai) OR (thanh tai)) cua te*.