Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, hieu lang
dong trong » duong trong, dung trong, cong trong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
thanh bac » thanh bai, thanh san, thanh hai
nhanh bac » nhanh ha, nhanh va
cua dong » chua dong, cua cong, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu manh)) - hanh tranh cua dong trong cac ((thanh bac) OR (nhanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu manh)) - hanh tranh cua dong trong cac ((thanh bac) OR (nhanh bac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu manh)) - hanh tranh cua dong trong cac ((thanh bac) OR (nhanh bac))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu manh)) - hanh tranh cua dong trong cac ((thanh bac) OR (nhanh bac))*.