Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
ganh nang » anh nang, nganh nong, van nang
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
nang qua » nang quan, nang dua, nang cua
qua dung » quang dung, su dung, qua song
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (thien anh)) - ganh nang qua dung cong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien anh)) - ganh nang qua dung cong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - ganh nang qua dung cong ((dan toan) or (manh toan)) cao*.