Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
su triet » su viet, su tien, ve triet
sach uu » sach luu, sach tu, sach xu
nang xa » nang x, lang xa, nang ma
uu nang » cuu nang, vu nang, cuu nong
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
ki su » ky su

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 uu nang xa hoi. hieu ((va cam) or (va cao)) xuc ((van hanh) OR (ban hanh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach uu nang xa hoi. hieu ((va cam) OR (va cao)) xuc ((van hanh) OR (ban hanh)) ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach uu nang xa hoi. hieu ((va cam) or (va cao)) xuc ((van hanh) OR (ban hanh)) ki su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach uu nang xa hoi. hieu ((va cam) or (va cao)) xuc ((van hanh) OR (ban hanh)) ki su triet*.