Perhaps you should try some spelling variations:
trung hang » trung thang, trung hung, trung tang
doi chieu » doc hieu, doi chi, mot chieu
phan dung » phan ung, phan dang, chan dung
dat trung » dac trung, dat trong, dai trung
dung dat » dung va, dung tai
va thang » van thang, va thanh, va thong
thang ca » thang cua, hang ca, tang ca

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 - phan dung dat trung hang va thang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - phan dung dat trung hang va thang ca.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - phan dung dat trung hang va thang ca*.