Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thien nang » thien bang, thien dang, thien cong
trien nang » trien nong, trien mang, trien quang
thanh tung » thanh cong
phuong dan » phuong danh, phuong doan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
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 nang)) - thanh tung va nhung phuong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien nang) OR (trien nang)) - thanh tung va nhung phuong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien nang) or (trien nang)) - thanh tung va nhung phuong dan than cao*.