Perhaps you should try some spelling variations:
trung ha » trung hoc, trung tam, trung cap
trung va » truong va, trang va, trung tam
so sach » so sanh, bo sach, co sach
cso hoc » co hoc, cho hoc, cao hoc
hang de » hoang de, hanh de, hang di
hieu ve » hieu va, hieu van
de cua » le cua, te cua, dieu cua
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
so hoc » co hoc, mo hoc, so hoa
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ((cso hoc) or (so hoc)). hieu ve cam ((trung va) OR (trung ha)) hang de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ((cso hoc) OR (so hoc)). hieu ve cam ((trung va) OR (trung ha)) hang de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ((cso hoc) or (so hoc)). hieu ve cam ((trung va) OR (trung ha)) hang de cua te".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((cso hoc) or (so hoc)). hieu ve cam ((trung va) OR (trung ha)) hang de cua te*.