Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hang doi » hang di, hang loi, huong doi
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach v nang xa hoi. hieu va cac tuc van ((hang doi) or (hang va)) ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang xa hoi. hieu va cac tuc van ((hang doi) OR (hang va)) ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang xa hoi. hieu va cac tuc van ((hang doi) or (hang va)) ((cua triet) OR (va triet))*".