Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
lap cua » lai cua, lam cua, ap cua
tap cua » tap quan, tiep cua
va cai » va cac, va bai, va dai
x hoi » xa hoi, o hoi, x ho

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) or (so sach)) ky nang x hoi. hieu va cai dat va thanh ((lap cua) OR (tap cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sach)) ky nang x hoi. hieu va cai dat va thanh ((lap cua) OR (tap cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (so sach)) ky nang x hoi. hieu va cai dat va thanh ((lap cua) OR (tap cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sach)) ky nang x hoi. hieu va cai dat va thanh ((lap cua) OR (tap cua)) te*.