Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
hoc thieu » toc thieu
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong van » cong vang, cong san, song van
van hanh » van thanh, ban hanh, van anh
hanh cac » hang cac, hanh cat, nhanh cay

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

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