Perhaps you should try some spelling variations:
lang thong » lang trong, lang thang, mang thong
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
thong van » trong van, thong va, thong quan
doc hieu » toc thieu, hoc thieu, hoc hien
vat lang » va lang, van lang, vat mang
toan cao » toan tap
toan ban » van ban

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: ((doc hieu) OR (doi khi)) xanh - canh trinh vat lang thong van ((toan cao) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi khi)) xanh - canh trinh vat lang thong van ((toan cao) or (toan ban))*.