Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » am thuc, nam thu, nam tu
su triet » su viet, su tien, ve triet
tang hoa » hang hoa, tang ha, tang ho
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky tang » ky nang, ky dang, kho tang
hanh ve » hanh vi, hanh kem
hanh va » hang va, hanh vi

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 ky tang hoa hoi. hieu va ((nam thuc) or (nam thuoc)) vat ((hanh ve) OR (hanh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang hoa hoi. hieu va ((nam thuc) OR (nam thuoc)) vat ((hanh ve) OR (hanh va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang hoa hoi. hieu va ((nam thuc) or (nam thuoc)) vat ((hanh ve) OR (hanh va)) su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang hoa hoi. hieu va ((nam thuc) or (nam thuoc)) vat ((hanh ve) OR (hanh va)) su triet*.