Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
phuong dan » phuong danh, phuong doan, huong dan
hieu lang » chieu sang, hieu quang, hieu van
dan toan » van toan, dan than, manh toan
toan cau » 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: theo ((hieu lang) OR (nhieu tang)) - thanh tung va nhung phuong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (nhieu tang)) - thanh tung va nhung phuong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (nhieu tang)) - thanh tung va nhung phuong dan toan cau*.