Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
cham loc » cham soc, chon loc, cham o
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va danh » va dinh, va hanh, dia danh
tu sach » thu sach, su sach, te sach
va dan » ca dan, va dao, va dau
di cua » dai cua, doi cua, de cua
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: ((tu sach) or (thuoc sach)) ky nang x hoi. hieu va cham loc ((va danh) OR (va dan)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky nang x hoi. hieu va cham loc ((va danh) OR (va dan)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) ky nang x hoi. hieu va cham loc ((va danh) OR (va dan)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky nang x hoi. hieu va cham loc ((va danh) OR (va dan)) di cua triet*.