Perhaps you should try some spelling variations:
lang trong » cong trong, dong trong
trong phat » trong thuat, trong nha, trong hoat
doi chieu » doc hieu, doi chi, mot chieu
phat dung » hat dung, pham dung, phan dung
trong tan » trong quan, trong cac, trong ca
tan phan » toan phan, than phan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) tinh - lang trong phat dung trong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - lang trong phat dung trong tan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - lang trong phat dung trong tan phan tu*.