Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
tuan xuc » quang xuc, tuan khuc, toan xac
van hanh » van thanh, ban hanh, van anh
hanh doi » thanh doi, hanh noi, hang doi
su triet » su viet, su tien, ve triet
tu cach » tu cac
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
xuc van » duc van, luc van, vuc van
doi su » oi su, don su, voi su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (hoc sach)) ky lang xa hoi. hieu van tuan xuc van hanh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (hoc sach)) ky lang xa hoi. hieu van tuan xuc van hanh doi su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (hoc sach)) ky lang xa hoi. hieu van tuan xuc van hanh doi su triet*.