Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
dap nhung » vap nhung, va nhung, dap ung
trong van » trong cac
ho chieu » theo chieu, doi chieu, mot chieu
tung dap » tung dan, trung dai, tuong dan
tang van » dang van, hoang van, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sach - thanh tung dap nhung ((tang van) OR (trong van)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh tung dap nhung ((tang van) OR (trong van)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) sach - thanh tung dap nhung ((tang van) OR (trong van)) van ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sach - thanh tung dap nhung ((tang van) OR (trong van)) van ban*.