Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thuat dung » thuat hung, thuat xung, thuat song
trong dang » truong dang, trong dan, trong dong
hoc chieu » hoc thieu, ho chieu, hoc hien
thuat ung » thuat hung, thuat xung, thuat song
dang phan » dung phan, nang phan, dang phat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - canh tranh ((thuat ung) or (thuat dung)) trong dang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - canh tranh ((thuat ung) OR (thuat dung)) trong dang phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - canh tranh ((thuat ung) or (thuat dung)) trong dang phan tu*.