Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
thanh tung » thanh cong
nhung cong » dung cong, thong cong, nhung don
tung tuan » trung tuan, hung tuan, quang tuan
hang cong » dang cong, hang nong, bang cong
ban cao » bao cao, ban can, ban co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thep ((thiet tach) OR (thuat tach)) - thanh tung tuan ((nhung cong) or (hang cong)) van ban cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thep ((thiet tach) OR (thuat tach)) - thanh tung tuan ((nhung cong) OR (hang cong)) van ban cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thep ((thiet tach) OR (thuat tach)) - thanh tung tuan ((nhung cong) or (hang cong)) van ban cao".
• Adding a wildcard symbol may retrieve word variants: thep ((thiet tach) OR (thuat tach)) - thanh tung tuan ((nhung cong) or (hang cong)) van ban cao*.