Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
hang ki » hang ke, hoang kim, hang tai
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang xa hoi. hieu ve cam xuc van ((hang ki) or (((hang vi) OR (hang di)))) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. hieu ve cam xuc van ((hang ki) OR (((hang vi) OR (hang di)))) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang xa hoi. hieu ve cam xuc van ((hang ki) or (((hang vi) OR (hang di)))) su triet*".