Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thi » sach tai, sach thieu, sach tham
sach thu » sach thue, sach thieu, sach tham
hanh tri » thanh tri, hanh tai, hanh trinh
hanh xa » hanh va, hanh ma, hanh xu
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve nam » he nam, le nam, te nam
va nam » van nam, ha nam, va nay

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 nam) or (va nam)) thuc va hanh tri 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 nam) OR (va nam)) thuc va hanh tri 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 nam) or (va nam)) thuc va hanh tri cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) OR (sach thu)) hanh xa hoi. hieu ((ve nam) or (va nam)) thuc va hanh tri cua triet*.