Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
anh nang » ganh nang, anh bang, anh dang
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 danh)) - anh 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 danh)) - anh nang qua dung cong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien danh)) - anh nang qua dung cong ((dan toan) or (manh toan)) cao*.