Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
giao va » gia va, giai va, giao la
gian va » gian van, gian ve, gian ha
dan vai » dan va, dan tai, dan vat
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: thuoc sach ty nang x hoi. hieu va cac ((giao va) OR (gian va)) dan vai ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang x hoi. hieu va cac ((giao va) OR (gian va)) dan vai ((cua triet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty nang x hoi. hieu va cac ((giao va) OR (gian va)) dan vai ((cua triet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang x hoi. hieu va cac ((giao va) OR (gian va)) dan vai ((cua triet) or (cua vat))*.