Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
trung hoc » trung quoc
dung cong » dung trong
hoc dung » hoc ung, hoc dan, tac dung
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) tinh - thanh trung hoc dung cong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) tinh - thanh trung hoc dung cong tac ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) tinh - thanh trung hoc dung cong tac ((toan cau) or (toan tap))*.