Perhaps you should try some spelling variations:
sinh cua » manh cua, dinh cuu, sinh va
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dinh cu » dinh cuu, dinh chuc, dinh chau
suc van » su van, duc van, luc van
cao suc » cao su, cao duc
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao
vi cuu » vi luu, vinh cuu
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu va cao suc van hanh ((vi cuu) or (((dinh cu) or (sinh cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hoi. hieu va cao suc van hanh ((vi cuu) OR (((dinh cu) OR (sinh cua)))) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoi. hieu va cao suc van hanh ((vi cuu) or (((dinh cu) or (sinh cua)))) tre*.