Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
thu nang » thi nang, thu hang, thu bang
bo sach » co sach, hoc sach
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
chua va » chuc va, chua may, chuan ha
va kham » va khao, va tham, vu kham
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
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: ((bo sach) or (so sanh)) thu nang xa hoi. hieu ((va kham) OR (va cham)) chua va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (so sanh)) thu nang xa hoi. hieu ((va kham) OR (va cham)) chua va hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (so sanh)) thu nang xa hoi. hieu ((va kham) OR (va cham)) chua va hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (so sanh)) thu nang xa hoi. hieu ((va kham) OR (va cham)) chua va hanh dai cua te*.