Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thang long » thanh cong
toc thien » toc thieu, ton thien, duoc thien
long gian » long giao, luong giao, khong gian
gian lang » gian dan
lang cong » dang cong, bang cong, hang cong
cong dan » cong san, cong tan, huong dan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thien hach - thang long gian lang cong dan ((luan van) OR (phan lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thien hach - thang long gian lang cong dan ((luan van) OR (phan lap))*".