Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
truong cao » truong dai
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
dong cong » duong cong, dung cong, dang cong
cao dong » cao dang, lao dong, cao cong
tan toan » tan tran, tap toan, van toan
bai toan » bai 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 xanh) or (hien hanh)) - hanh truong cao dong cong ((tan toan) or (bai toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh truong cao dong cong ((tan toan) OR (bai toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh truong cao dong cong ((tan toan) or (bai toan)) cao*.