Perhaps you should try some spelling variations:
bo sach » co sach, hoc sach
sach tu » sach thu, cach tu, sach ty
cua tuc » cua tu, cua thuoc, luat tuc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu van
cua duc » cua nuoc, cua quoc
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: bo sach tu nang x hoi. ((hieu ve) or (hieu va)) cam duc va hanh di ((cua tuc) OR (cua duc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach tu nang x hoi. ((hieu ve) OR (hieu va)) cam duc va hanh di ((cua tuc) OR (cua duc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach tu nang x hoi. ((hieu ve) or (hieu va)) cam duc va hanh di ((cua tuc) OR (cua duc))".
• Adding a wildcard symbol may retrieve word variants: bo sach tu nang x hoi. ((hieu ve) or (hieu va)) cam duc va hanh di ((cua tuc) OR (cua duc))*.