Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cao » chan cho, chat cao, chay cao
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - lanh ((manh va) or (hang va)) thong cong dan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - lanh ((manh va) OR (hang va)) thong cong dan chan cao.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - lanh ((manh va) or (hang va)) thong cong dan chan cao*.