Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh trong » anh trong, hanh trong, lanh trong
cong trong » cong thuong, duong trong, cong trinh
vung trong » dung trong, cung trong, duong trong
phat vung » phap vuong, phan ung, thai vung
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tinh - ((canh trong) OR (cong trong)) phat vung trong tan phan tu~.
• Adding a wildcard symbol may retrieve word variants: toc thieu tinh - ((canh trong) or (cong trong)) phat vung trong tan phan tu*.