Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
tu sach » thu sach, su sach, te sach
van ve » van de, ban ve, van le

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 ty ((nang xa) or (sang ma)) hoi. hieu van ((cam duc) or (cao duc)) gia thanh van ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (sang ma)) hoi. hieu van ((cam duc) OR (cao duc)) gia thanh van ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (sang ma)) hoi. hieu van ((cam duc) or (cao duc)) gia thanh van ve triet*.