Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu cach » hieu cac, chieu sach, hieu ca
hanh manh » lanh manh, hoang manh, thanh minh
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
cong van » cong vang, cong san, song van
va dung » van dung, va duong, vat dung
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu cach) or (chiet tach)) - ((hanh manh) OR (hanh mang)) va dung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu cach) OR (chiet tach)) - ((hanh manh) OR (hanh mang)) va dung cong van van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu cach) or (chiet tach)) - ((hanh manh) OR (hanh mang)) va dung cong van van ban".
• Adding a wildcard symbol may retrieve word variants: toc ((hieu cach) or (chiet tach)) - ((hanh manh) OR (hanh mang)) va dung cong van van ban*.