Perhaps you should try some spelling variations:
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
va tinh » may tinh
tinh ki » trinh ki, tinh vi, tinh kien

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 tinh ki ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va pham duc va tinh 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 tinh ki ((su triet) or (ve triet))*.