Perhaps you should try some spelling variations:
phuong danh » phuong anh, phuong dinh, phuong hanh
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trang » thanh trung, canh tranh, hanh trinh
phuong dan » phuong doan, huong dan, phuong lan
hanh tang » anh tang, hanh mang, hanh tung
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sang - ((hanh tang) or (hanh trang)) va nhung ((phuong dan) OR (phuong danh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - ((hanh tang) OR (hanh trang)) va nhung ((phuong dan) OR (phuong danh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - ((hanh tang) or (hanh trang)) va nhung ((phuong dan) OR (phuong danh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - ((hanh tang) or (hanh trang)) va nhung ((phuong dan) OR (phuong danh)) toan tap*.