Perhaps you should try some spelling variations:
dong trong » duong trong, dung trong, cong trong
thoi hanh » thi hanh, troi hanh, tuoi thanh
trung hoa » trung hoc, trung ha
trung cap » truong cao, trung tam
trong dan » trong dang, trong san, trong tan
dan phan » doan phan, dan chan, van phan
do thoi » dao thoi, doi thoi, do thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: do thoi hanh - thanh ((trung hoa) or (trung cap)) dong trong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: do thoi hanh - thanh ((trung hoa) OR (trung cap)) dong trong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: do thoi hanh - thanh ((trung hoa) or (trung cap)) dong trong dan phan tu*.