Perhaps you should try some spelling variations:
trung khanh » truong khanh, truong thanh, trung phan
trung thanh » truong thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tran van » luan van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - thanh ((trung khanh) OR (trung thanh)) dung cong tan tran van~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - thanh ((trung khanh) or (trung thanh)) dung cong tan tran van*.