Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nhanh hai » nhanh thai, thanh hai, nhanh ha
van nhanh » van thanh, van hanh, van khanh
dam thuc » am thuc, dan thuc, dai thuc
nam thuc » nam thuoc, am thuc, nam thu
hai cua » thai cua, dai cua, hoi cua
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
sach ty » sach y, sach tu, sach thu

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