Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh hang » thanh hang, hang hang, hanh han
bang cong » dang cong, bang song, hang cong
cong dan » cong san, cong tan, huong dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh hang va bang cong dan ((than cao) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh hang va bang cong dan ((than cao) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh hang va bang cong dan ((than cao) or (than cap))*.