Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan, thuc vat
sach thu » sach thue, sach thieu, sach tham
hanh tai » thanh tai, hang tai, han tai
sach thi » sach tai, sach thieu, sach tham
thuc day » thuc vat
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
ve am » va am

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 thi) or (sach thu)) hanh xa hoi. hieu ve am ((thuc day) OR (thuc dan)) hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thu)) hanh xa hoi. hieu ve am ((thuc day) OR (thuc dan)) hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thi) or (sach thu)) hanh xa hoi. hieu ve am ((thuc day) OR (thuc dan)) hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thu)) hanh xa hoi. hieu ve am ((thuc day) OR (thuc dan)) hanh tai cua triet*.