Perhaps you should try some spelling variations:
thanh tung » thanh cong
phap thong » phap phong, phap chong, pho thong
hieu cach » hieu cac, chieu sach, hieu ca
cap thong » cap tong, chap thuong, chap phong
toc hieu » toc thieu, doc hieu, hoc thieu
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 - ((thanh trung) OR (thanh tung)) ((cap thong) or (phap thong)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu cach - ((thanh trung) OR (thanh tung)) ((cap thong) OR (phap thong)) cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu cach - ((thanh trung) OR (thanh tung)) ((cap thong) or (phap thong)) cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: toc hieu cach - ((thanh trung) OR (thanh tung)) ((cap thong) or (phap thong)) cong dan van ban*.