Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
bo sach » co sach, hoc sach
cam duc » cam xuc, cao duc, pham duc
doi cua » dai cua, hoi cua
va tinh » may tinh
cua tuc » cua duc, cua tu, cua thuoc
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
tu nang » tru nang, tu nong, tu nano
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 thanh) OR (va tinh)) doi cua tuc~.
• 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 thanh) OR (va tinh)) doi cua tuc.
• 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 thanh) OR (va tinh)) doi cua tuc".
• Adding a wildcard symbol may retrieve word variants: bo sach tu nang x hoi. ((hieu ve) or (hieu va)) cam duc ((va thanh) OR (va tinh)) doi cua tuc*.