Perhaps you should try some spelling variations:
vien nganh » vien thanh
trong manh » trong minh, trong anh, trong mach
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tang » hanh trang, anh tang, hanh mang
chua dong » cua dong, huy dong, hoa dong
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban
ha dong » hoat dong, van dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (vien nganh)) - hanh tang ((chua dong) OR (ha dong)) trong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (vien nganh)) - hanh tang ((chua dong) OR (ha dong)) trong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (vien nganh)) - hanh tang ((chua dong) OR (ha dong)) trong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (vien nganh)) - hanh tang ((chua dong) OR (ha dong)) trong manh toan ban*.