Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
van hanh » van thanh, ban hanh, van anh
van dinh » van minh, van dich, va dinh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
co duc » co duoc, cao duc, do duc
cua tu » cua tuc, cua su, cua cu
va co » vo co
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: su sach tru nang x hoi. hieu va co duc ((van dinh) or (van hanh)) va ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang x hoi. hieu va co duc ((van dinh) OR (van hanh)) va ((cua te) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tru nang x hoi. hieu va co duc ((van dinh) or (van hanh)) va ((cua te) OR (cua tu))*".