Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat tac, thuat thanh
thuat mach » thuat sach, thuyet mach, thuat lanh
thanh tung » thanh cong
dung cong » dung trong
tung qua » dung qua, tuong quan, trung quan
qua dung » quang dung, su dung, qua song
cong tac » cong ty
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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

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