Perhaps you should try some spelling variations:
lieu van » lieu va, hieu van, sieu van
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
van cau » van dau, van hau, van chat
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
de cua » le cua, te cua, dieu cua
cua te » cua tu
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) or (o hoi)). lieu van cau truc ((van hanh) OR (ban hanh)) de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((x hoi) OR (o hoi)). lieu van cau truc ((van hanh) OR (ban hanh)) de cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ((x hoi) or (o hoi)). lieu van cau truc ((van hanh) OR (ban hanh)) de cua te*".