Perhaps you should try some spelling variations:
nhanh trong » hanh trong, nhan trong, chinh trong
thanh trung » thanh tung
dong trong » duong trong, dung trong, cong trong
hien sach » dien sach, kien sach, thien hach
hien hanh » dieu hanh
trong bai » trong ban, thong bai, trong hai
bai toan » bai tap
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 ((hien sach) or (hien hanh)) - ((nhanh trong) or (thanh trung)) van dong trong bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (hien hanh)) - ((nhanh trong) OR (thanh trung)) van dong trong bai toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (hien hanh)) - ((nhanh trong) or (thanh trung)) van dong trong bai toan cao*.