Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
su triet » su viet, su tien, ve triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
ba benh » bo benh, bach benh, tai benh
va benh » tai benh, gay benh, cac benh
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
dai su » dai sua, dai so, dan 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) or (thuoc sach)) ky lang xa hoi. hieu va cam xuc ((ba benh) OR (va benh)) dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky lang xa hoi. hieu va cam xuc ((ba benh) OR (va benh)) dai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ky lang xa hoi. hieu va cam xuc ((ba benh) OR (va benh)) dai su triet*".