Perhaps you should try some spelling variations:
hien thinh » tien thinh, thien thanh, thien chinh
lang luan » tang luan, hang luan, lang xuan
bang luan » tang luan, hang luan, dung luan
phan cong » thanh cong
tan trinh » tan thinh, tao trinh, dan trinh
trinh han » trinh quan
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 thinh - nhanh ((lang luan) or (bang luan)) phan cong tan trinh han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien thinh - nhanh ((lang luan) OR (bang luan)) phan cong tan trinh han*.