Perhaps you should try some spelling variations:
dung cong » dung trong
tinh sang » tinh quang, tinh trang, trinh san
hoc tien » hoc tieng, hoc vien, hoc tren
sang qua » song qua, sang cua, nang quan
qua dung » quang dung, su dung, qua song
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tien) or (hoc hien)) anh - tinh sang qua dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tien) OR (hoc hien)) anh - tinh sang qua dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc hien)) anh - tinh sang qua dung cong tac toan cau*.