Perhaps you should try some spelling variations:
vung nhanh » dung nhan
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
vung lanh » tuong lanh, dung danh, vung van
toan cau » toan cao, toan ban, toan tap
chu van » cuu van, chu han
tang va » trang va, tang van, thang va

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 van) or (hieu lang)) - hanh tang va nhung ((vung lanh) OR (vung nhanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu van) OR (hieu lang)) - hanh tang va nhung ((vung lanh) OR (vung nhanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu van) or (hieu lang)) - hanh tang va nhung ((vung lanh) OR (vung nhanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chu van) or (hieu lang)) - hanh tang va nhung ((vung lanh) OR (vung nhanh)) toan cau*.