Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
dang huong » dang thuong, dang hung, dong huong
trinh vat » trinh van, trinh luat, sinh vat
huong van » huong dan, duong van, hong van
doc hieu » toc thieu, hoc thieu, hoc hien
vat dang » van dang, vat dung, va dang
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (doi chi)) xanh - canh trinh vat dang huong van ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (doi chi)) xanh - canh trinh vat dang huong van ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi chi)) xanh - canh trinh vat dang huong van ((toan tai) or (toan ban))*.