Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
thuong dung » thong dung, phuong dung, thuong dong
dung dang » dung dan, dung dong, dung danh
dang khan » dang khanh, dang khai, dang thanh
thieu ca » thieu cac, thieu cua, hieu ca
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu ca - thanh ((phuong cham) or (phung van)) thuong dung dang khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu ca - thanh ((phuong cham) OR (phung van)) thuong dung dang khan ap*.