Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh van » tran van, trinh van, thanh van
tranh va » trang va, trinh va, thanh va
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: hoc chiet tach - canh ((tranh va) OR (tranh van)) thong cong dan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - canh ((tranh va) OR (tranh van)) thong cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - canh ((tranh va) OR (tranh van)) thong cong dan van ban*.