Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ve triet » va trien, su triet
cam duc » cam xuc, cao duc, nam duoc
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
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: su sach ty ((nang xa) or (sang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) gia thanh van ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (sang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) gia thanh van ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (sang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) gia thanh van ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (sang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) gia thanh van ve triet*.