Perhaps you should try some spelling variations:
dieu tinh » diep tinh, lieu tinh, dien tinh
manh hung » anh huong
dung cong » dung trong
manh toan » thanh toan, tinh toan
hoc dieu » hoc thieu, hoc hien
hung cua » huong cua, chung cua, khung cua
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu tinh - manh hung cua dung cong ((manh toan) or (anh tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu tinh - manh hung cua dung cong ((manh toan) OR (anh tuan)) cao*.