Perhaps you should try some spelling variations:
thuc dan » thuc hanh, thuc vat
danh dai » danh dau, danh di, danh sai
bo sach » co sach, hoc sach
so sanh » do sanh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
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: ((bo sach) or (so sanh)) ky nang xa hoi. hieu va cam ((thuc dan) OR (hoc dan)) danh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (so sanh)) ky nang xa hoi. hieu va cam ((thuc dan) OR (hoc dan)) danh dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (so sanh)) ky nang xa hoi. hieu va cam ((thuc dan) OR (hoc dan)) danh dai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (so sanh)) ky nang xa hoi. hieu va cam ((thuc dan) OR (hoc dan)) danh dai cua tu*.