Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
cham duc » pham duc, cham soc, pham duy
dieu cua » dieu tra
tu sach » thu sach, su sach, te sach
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
va hanh » van hanh, va thanh, va danh
de cua » le cua, te cua
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: tu sach tru nang x hoi. hieu tu cham duc va hanh ((de cua) OR (dieu cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru nang x hoi. hieu tu cham duc va hanh ((de cua) OR (dieu cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x hoi. hieu tu cham duc va hanh ((de cua) OR (dieu cua)) triet*.