Perhaps you should try some spelling variations:
thang long » thanh cong
lang trong » dung trong, cong trong, dong trong
trong tinh » truong tinh, trong kinh, trong sinh
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
long gian » long giao, luong giao, khong gian
gian lang » gian dan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu manh)) - thang long gian lang trong tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - thang long gian lang trong tinh toan tap.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - thang long gian lang trong tinh toan tap*.