Perhaps you should try some spelling variations:
sinh trong » sinh truong, sinh trung, dinh trong
hien xanh » hien hanh, hien nhanh, chieu xanh
quan dung » quang dung, quan duong, quan dong
qua dung » quang dung, su dung, qua song
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

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