Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
va dam » van dam, va dao, va dau
dam tu » nam tu, cam tu, tam tu
vi su » va su, ve su, ki su

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) or (do sanh)) ky nang xa hoi. hieu va dam tu ((va hanh) or (va danh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (do sanh)) ky nang xa hoi. hieu va dam tu ((va hanh) OR (va danh)) vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (do sanh)) ky nang xa hoi. hieu va dam tu ((va hanh) or (va danh)) vi su triet*.