Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
trien quang » tran quang, tuyen quang, dien quang
thien nang » thien bang, thien dang, trien nang
thanh tung » thanh cong
phuong dan » phuong danh, phuong doan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien nang) or (trien quang)) - thanh tung va nhung phuong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien nang) OR (trien quang)) - thanh tung va nhung phuong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien nang) or (trien quang)) - thanh tung va nhung phuong dan toan cao*.