Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc dieu
cua nhung » va nhung
cong san » cong tac
san van » tan van, luan van, tran van

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) or (hoc hien)) xanh - ((hanh trang) OR (thanh trung)) cua nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) xanh - ((hanh trang) OR (thanh trung)) cua nhung cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc hien)) xanh - ((hanh trang) OR (thanh trung)) cua nhung cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) xanh - ((hanh trang) OR (thanh trung)) cua nhung cong san van ban*.