Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
canh danh » anh danh, canh dan, canh tranh
dung cong » dung trong
hoan phan » hoa phan, toan phan, hoan thanh
doan phan » doanh phan, toan phan, dan phan
ho chieu » theo chieu, doi chieu, mot chieu
danh qua » hanh qua, doanh quan, manh quan
qua dung » quang dung, su dung, qua song

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh danh qua dung cong ((hoan phan) OR (doan phan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - canh danh qua dung cong ((hoan phan) OR (doan phan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - canh danh qua dung cong ((hoan phan) OR (doan phan)) cau*.