Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi hang » thi hanh, thi hong, thi thanh
hanh vai » hanh vi, hanh tai, hanh van
thi nang » thi cong, ki nang, thi hanh
nam thuc » nam thuoc, am thuc, nam thu
hanh va » hang va, hanh vi
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ca hoi » cau hoi, cua hoi, xa hoi
ve nam » he nam, va nam, le nam

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