Perhaps you should try some spelling variations:
sinh trong » sinh truong, sinh trung, dinh trong
trong gian » trong giang, trong giao, trong gia
doc hieu » hoc thieu, hoc hien
gian dan » gian lang
dan dung » van dung, tin dung, ap dung
dung php » dung phu, dung phan, dung phat
php phan » phap phan, phe phan, phi phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sang - sinh trong gian dan dung php phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - sinh trong gian dan dung php phan tu.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - sinh trong gian dan dung php phan tu*.