Perhaps you should try some spelling variations:
tran hoang » tran hong, quan hoang, tran quang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh cua » tinh cua, trinh luat, trinh luan
ban cong » bang cong, van cong, phan cong
cong tan » cong tac, cong san, cong thanh

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 trinh cua ban cong tan ((tran hoang) or (trinh quan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh cua ban cong tan ((tran hoang) OR (trinh quan)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh cua ban cong tan ((tran hoang) or (trinh quan))*.