Perhaps you should try some spelling variations:
trong van » trong cac
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
tang van » dang van, hoang van, tang luan
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
so sach » so sanh, bo sach, co sach
xuc va » duc va, tuc va, luc va

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 ky ((tang van) OR (trong van)) hoi. hieu van cam xuc va ((hanh di) or (hanh de)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((tang van) OR (trong van)) hoi. hieu van cam xuc va ((hanh di) OR (hanh de)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((tang van) OR (trong van)) hoi. hieu van cam xuc va ((hanh di) or (hanh de)) ve triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((tang van) OR (trong van)) hoi. hieu van cam xuc va ((hanh di) or (hanh de)) ve triet*.