Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
cua triet » cua viet, su triet, va triet
hien cac » thien cac, vien cac, hieu cac
hang doi » hang di, hang loi, huong doi
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, truc van, duc van
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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 y nang xa hoi. hieu hien cac ((tuc van) OR (tuc va)) ((hang doi) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu hien cac ((tuc van) OR (tuc va)) ((hang doi) OR (hanh vi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu hien cac ((tuc van) OR (tuc va)) ((hang doi) or (hanh vi)) cua triet*".