Perhaps you should try some spelling variations:
thiet thanh » thien thanh, thi thanh, viet thanh
thanh tung » thanh cong
cua truong » cua trung, xuan truong, cac truong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tung cua » trung cua, tuong cua, dung cua
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet thanh - thanh tung cua truong ((cong tan) or (cong san)) ((phan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet thanh - thanh tung cua truong ((cong tan) OR (cong san)) ((phan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet thanh - thanh tung cua truong ((cong tan) or (cong san)) ((phan cau) or (phan cac))*.