Perhaps you should try some spelling variations:
khoi thuat » ki thuat, hoc thuat
thuat tach » thuat sach, thuat mach, thuat tac
trung quan » truong quan, trong quan, trung tuan
dung cong » dung trong
tung qua » dung qua, tuong quan, duong qua
cong tac » cong ty
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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

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