Perhaps you should try some spelling variations:
tranh nhung » trinh nhung, tranh hang, tran hung
thanh tran » thanh trang, thanh toan, thanh tra
hien xanh » hien hanh, hien nhanh, chieu xanh
tuan hung » tran hung, luan hung, tuan dung
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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 - thanh tran ((tranh nhung) or (tuan hung)) huong dan ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh tran ((tranh nhung) OR (tuan hung)) huong dan ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh tran ((tranh nhung) or (tuan hung)) huong dan ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh tran ((tranh nhung) or (tuan hung)) huong dan ((than cau) OR (toan cau))*.