Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
canh xa » canh va, canh tac, canh tay
dinh xa » dinh ba, dinh va, dinh xu
cac tu » cac thu, cach tu, cac du
tu van » tu va
ve cac » va cac, vien cac

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