Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thanh tung » thanh cong
cap thuong » chap thuong, ca thuong, cao thuong
thuong con » thuong dong, truong cong, thong cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tung cap » trung cap, cung cap, thong cap
bai toan » bai tap
toan cao » toan ban, toan tap
con bai » co bai, con ban, con lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (hieu manh)) - thanh tung cap thuong con bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh tung cap thuong con bai toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh tung cap thuong con bai toan cao*.