Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
ban danh » ban doanh, ban hanh, ban dan
dan danh » van danh, han danh, dai danh
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam hoc » cao hoc, am hoc, cam hoa
so sanh » do sanh
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (so sanh)) y nang xa hoi. hieu van cam hoc ((dan danh) OR (ban danh)) doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (so sanh)) y nang xa hoi. hieu van cam hoc ((dan danh) OR (ban danh)) doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (so sanh)) y nang xa hoi. hieu van cam hoc ((dan danh) OR (ban danh)) doi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (so sanh)) y nang xa hoi. hieu van cam hoc ((dan danh) OR (ban danh)) doi cua tu*.