Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
dang hong » dang hoang, dang cong, dang hung
doc hieu » toc thieu, hoc thieu, hoc hien
van dang » van dong, van dung, van nang
hong van » hoang van, thong van, phong van
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 van dang hong 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 van dang hong van ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi chi)) xanh - canh trinh van dang hong van ((toan tai) or (toan ban))*.