Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
nam danh » nam dinh, nam dan
hieu he » hieu ve, hiem he, hieu le
va kinh » va tinh, qua kinh
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te sach
he nam » ha nam, nghe nam
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu he nam thu ((nam danh) or (va kinh)) sai ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu he nam thu ((nam danh) OR (va kinh)) sai ((su triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu he nam thu ((nam danh) or (va kinh)) sai ((su triet) or (va triet))*.