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

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