Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
duong manh » duong van
hien xanh » hien hanh, hien nhanh, hien khanh
han duong » hai duong, van duong, thanh duong
manh toan » thanh toan, anh tuan, tinh toan
luong va » dung va
toan ban » van ban
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 ((hien xanh) OR (chieu xanh)) - thanh ((tung va) or (luong va)) han duong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - thanh ((tung va) OR (luong va)) han duong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (chieu xanh)) - thanh ((tung va) or (luong va)) han duong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (chieu xanh)) - thanh ((tung va) or (luong va)) han duong manh toan ban*.