Perhaps you should try some spelling variations:
thang nguong » tang nguon, hang nguon, than nguon
canh trinh » canh tranh, hanh trinh, canh tinh
nguong dan » huong dan
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh hoa » trinh do, trinh han
hoa thang » hoa thanh, hoa than, hoa thong
thanh lap » thanh san, phan lap, thanh hai
than cap » khan cap, thanh cac, than cua

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 - canh trinh hoa thang nguong dan ((than cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh trinh hoa thang nguong dan ((than cap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trinh hoa thang nguong dan ((than cap) or (thanh lap))*.