Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dam thuc » am thuc, dan thuc, dai thuc
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
nam thuc » nam thuoc, am thuc, nam thu
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
dang ha » dong ha, dung ha, lang ha
ha hoi » hoa hoi, ha noi, xa hoi

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) or (sach y)) dang ha hoi. hieu ve ((dam thuc) or (nam thuc)) van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) dang ha hoi. hieu ve ((dam thuc) OR (nam thuc)) van hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) dang ha hoi. hieu ve ((dam thuc) or (nam thuc)) van hanh vai cua triet*.