Perhaps you should try some spelling variations:
dung truong » duong truong, dung trong, dung trung
hieu lang » chieu sang, hieu quang, nhieu tang
tinh hinh » tinh ninh, tinh binh, linh chinh
dang phat » dang nhat, nang phat, hang phat
mot hieu » mot chieu, moi hieu, mot chien
hinh ung » hinh vung, hinh cung, hinh ong
dan phan » doan phan, dan chan, 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: mot hieu lang - tinh hinh ung dung truong ((dan phan) or (dang phat)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot hieu lang - tinh hinh ung dung truong ((dan phan) OR (dang phat)) cac.
• Adding a wildcard symbol may retrieve word variants: mot hieu lang - tinh hinh ung dung truong ((dan phan) or (dang phat)) cac*.