Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
ve triet » va trien
su triet » su viet, su tien
duc manh » suc manh, duc anh, duc minh
cac duc » cac du, cao duc, cac dac
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
ve cac » va cac, vien cac

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 ky) or (sach ty)) nang xa hoi. hieu ve cac duc manh hanh va ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cac duc manh hanh va ((su triet) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang xa hoi. hieu ve cac duc manh hanh va ((su triet) OR (ve triet))*".