Perhaps you should try some spelling variations:
thuc dan » thuc hanh, thuc vat
ve triet » va trien, su triet
hanh va » hang va, hanh vi
su sach » so sach, vu sach
hieu he » hieu ve, hiem he, hieu le
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
he nam » ha nam, nghe nam
ma hoi » mai hoi, xa hoi, ma hoa
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: su sach y nang ma hoi. hieu he nam ((thuc dan) or (hoc dan)) hanh va ((ve triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu he nam ((thuc dan) OR (hoc dan)) hanh va ((ve triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu he nam ((thuc dan) or (hoc dan)) hanh va ((ve triet) or (va thiet))*.