Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua cham » qua hai, qua cac, va cham
ly quang » le quang, vu quang
truc va » thuc va, thuc vat, trung va
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 ((ly hang) OR (ly quang)) cau hoi. hieu qua cham ((xuc va) or (truc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly hang) OR (ly quang)) cau hoi. hieu qua cham ((xuc va) OR (truc va)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly hang) OR (ly quang)) cau hoi. hieu qua cham ((xuc va) or (truc va)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly hang) OR (ly quang)) cau hoi. hieu qua cham ((xuc va) or (truc va)) hanh di cua triet*.