Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cao suc » cao su, cao duc
va cao » va cac, va co, va dao
y nang » ky nang, ly nang, v nang
ca su » cua su, cao su, ca sau

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 (so sach)) y nang xa hoi. hieu va cao suc ((va hanh) or (va danh)) ca su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. hieu va cao suc ((va hanh) OR (va danh)) ca su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang xa hoi. hieu va cao suc ((va hanh) or (va danh)) ca su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) y nang xa hoi. hieu va cao suc ((va hanh) or (va danh)) ca su triet*.