Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ((ve nam) or (le nam)) tu ((va danh) or (va dinh)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) tu ((va danh) OR (va dinh)) va su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ((ve nam) or (le nam)) tu ((va danh) or (va dinh)) va su triet*.