Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, phan duc
pham duy » pham duc
su triet » su viet, su tien, ve triet
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
hanh de » hanh ve, hanh kem
de su » den su, ve su, de tu

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 (pham duy)) va hanh de su 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 (pham duy)) va hanh de su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x ho. hieu va ((cham duc) or (pham duy)) va hanh de su triet*.