Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
dung phuong » dung thuong, bang phuong, dung chung
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
thao than » tho than, thai thanh, thuat than
chu xanh » chieu xanh, chua xang, chuc danh
chu manh » ho manh, chu han, chu van
than tap » toan tap, han tap, phan 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 ((chu xanh) OR (chu manh)) - ((hanh trang) or (hanh trinh)) su dung phuong thao than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chu manh)) - ((hanh trang) OR (hanh trinh)) su dung phuong thao than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chu manh)) - ((hanh trang) or (hanh trinh)) su dung phuong thao than tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chu manh)) - ((hanh trang) or (hanh trinh)) su dung phuong thao than tap*.