Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
xuan nhung » quan nhung, xuan chung, xuan hung
hien xanh » hien hanh, hien nhanh, chieu xanh
canh tran » canh tranh, hanh trang, banh trang
tran xuan » tran quang, tran van
cong tinh » cong trinh, long tinh, cong thanh
cong vinh » cong trinh, trong vinh, cong viec
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: hoc ((hien xanh) or (chieu sang)) - canh tran xuan nhung ((cong tinh) OR (cong vinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu sang)) - canh tran xuan nhung ((cong tinh) OR (cong vinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu sang)) - canh tran xuan nhung ((cong tinh) OR (cong vinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu sang)) - canh tran xuan nhung ((cong tinh) OR (cong vinh)) toan cau*.