Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
tan hanh » tan thanh, tang hanh, toan hanh
hanh dao » lanh dao, thanh dat, thanh dam
va triet » va trien, ve triet, cua triet
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
thiet » thieu

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 ty) or (sach nha)) nang xa hoi. hieu ve cham duc tan hanh dao ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach nha)) nang xa hoi. hieu ve cham duc tan hanh dao ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach nha)) nang xa hoi. hieu ve cham duc tan hanh dao ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach nha)) nang xa hoi. hieu ve cham duc tan hanh dao ((va triet) OR (va thiet))*.