Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
sach 2 » sach y
ve cam » ve cham, ve cac, va cam
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: tu ((sach va) or (sach 2)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach va) OR (sach 2)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach va) or (sach 2)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach va) or (sach 2)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cua triet))*.