Perhaps you should try some spelling variations:
phuong dan » phuong danh, phuong doan, phuong lan
tieu xanh » tieu danh, chieu xanh, dieu hanh
nhan dang » nhan dan, phan dang, tran dang
vat nhung » va nhung, vap nhung, vai nhung
dang vat » dang van, dong vat, dang nhat
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: theo tieu xanh - nhan dang vat nhung ((phuong dan) OR (huong dan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - nhan dang vat nhung ((phuong dan) OR (huong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - nhan dang vat nhung ((phuong dan) OR (huong dan)) toan cau*.