Perhaps you should try some spelling variations:
cham duc » pham duc, pham duy, phan duc
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
de cua » te cua, dieu cua
le cua » ly cua

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