Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
nhan tao » nhan tai, nhan dan
toan cao » toan ban, toan tap
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) OR (hoc thieu)) xanh - hanh ((nhan tao) or (van tai)) nhung cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) xanh - hanh ((nhan tao) OR (van tai)) nhung cong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (hoc thieu)) xanh - hanh ((nhan tao) or (van tai)) nhung cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (hoc thieu)) xanh - hanh ((nhan tao) or (van tai)) nhung cong manh toan cao*.