Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
manh hanh » xanh hanh, danh thanh, minh thanh
duc manh » suc manh, duc anh, duc minh
va triet » va thiet, va trien, ve triet
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
nang xa » lang xa, nang ma, mang xa
hanh de » hanh ve, hanh kem
sach v » sach va, sach y, sach 2
de va » de van, te va, ke va

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 v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam duc manh hanh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) OR (lieu va)) cam duc manh hanh de va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam duc manh hanh de va triet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam duc manh hanh de va triet*.