Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
thu nang » thi nang, thu hang, thu bang
chuc van » chuc va, thuc van, chuc can
so sach » bo sach, co sach, hoc sach
chu van » cuu van, chu han
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
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: ((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham ((chuc van) OR (chu van)) hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thu nang ma hoi. hieu ve pham ((chuc van) OR (chu van)) hanh dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham ((chuc van) OR (chu van)) hanh dai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham ((chuc van) OR (chu van)) hanh dai cua tu*.