Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
cang thang » cong thanh
dang thanh » dong thanh, dang hanh, hoang thanh
mot chieu » doi chieu
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
ho chieu » theo chieu, hoc thieu, doi chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (mot chieu)) xanh - canh trinh vat nhung cong ((cang thang) OR (dang thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) xanh - canh trinh vat nhung cong ((cang thang) OR (dang thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (mot chieu)) xanh - canh trinh vat nhung cong ((cang thang) OR (dang thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) xanh - canh trinh vat nhung cong ((cang thang) OR (dang thanh)) cau*.