Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh ki » thanh kim, thanh ky, thanh ke
su triet » su viet, su tien
ve triet » va trien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap

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 ky nang xa hoi. hieu va pham duc va thanh ki ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu va pham duc va thanh ki ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va pham duc va thanh ki ((su triet) OR (ve triet))*.