Perhaps you should try some spelling variations:
hlang trong » hoang trong, khoang trong, hanh trong
cong phuong » cong thuong, cong huong, dong phuong
lang trong » dung trong, cong trong, dong trong
phuong dan » phuong danh, phuong doan, huong dan
dan phan » doan phan, dan chan, van phan
doi chi » doi khi
chi dan » choi dan, chi van, thi dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi dan - ((hlang trong) or (lang trong)) thanh cong phuong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi dan - ((hlang trong) OR (lang trong)) thanh cong phuong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: doi chi dan - ((hlang trong) or (lang trong)) thanh cong phuong dan phan tu*.