Perhaps you should try some spelling variations:
trong phat » trong thuat, trong nha, trong hoat
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung pha » trung phan, trung phat, trung ha
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh ((trung pha) or (trong phat)) nhung cong ((dan toan) OR (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trung pha) OR (trong phat)) nhung cong ((dan toan) OR (dan than)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((trung pha) or (trong phat)) nhung cong ((dan toan) OR (dan than)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trung pha) or (trong phat)) nhung cong ((dan toan) OR (dan than)) ban*.