Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
nang sang » nang song, nong san
trong san » trong cac, cong san, dong san
sang qua » song qua, sang cua, nang quan
qua dung » quang dung, su dung, qua song
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 - nang sang qua dung trong san ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - nang sang qua dung trong san ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - nang sang qua dung trong san ((than cau) or (phan cau))*.