Perhaps you should try some spelling variations:
tmanh trung » thanh trung, thanh tung, manh tung
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, hoc hien, hoc dieu
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, doi chieu
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 (ho chieu)) sach - ((manh trung) or (tmanh trung)) cua nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) sach - ((manh trung) OR (tmanh trung)) cua nhung cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (ho chieu)) sach - ((manh trung) or (tmanh trung)) cua nhung cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (ho chieu)) sach - ((manh trung) or (tmanh trung)) cua nhung cong san van ban*.