Perhaps you should try some spelling variations:
dieu tinh » diep tinh, lieu tinh, dien tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cho dieu » cao dieu, co dieu, khoa dieu
cong tac » cong ty
tac han » tac nhan, tac ha, tac can
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho dieu tinh - hanh ((tranh cua) or (dung luan)) dung cong tac han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho dieu tinh - hanh ((tranh cua) OR (dung luan)) dung cong tac han tap.
• Adding a wildcard symbol may retrieve word variants: cho dieu tinh - hanh ((tranh cua) or (dung luan)) dung cong tac han tap*.