Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
nhung cong » dung cong, thong cong, hang cong
bang thanh » ban thanh, dang thanh, nang thanh
tang thanh » dang thanh, trung thanh, hoang thanh
hien xanh » hien hanh, hien nhanh, chieu xanh
tran tuan » tran xuan, tran quang, tranh luan

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 ((tran tuan) OR (tran thanh)) nhung cong ((bang thanh) or (tang thanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tran tuan) OR (tran thanh)) nhung cong ((bang thanh) OR (tang thanh)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((tran tuan) OR (tran thanh)) nhung cong ((bang thanh) or (tang thanh)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tran tuan) OR (tran thanh)) nhung cong ((bang thanh) or (tang thanh)) ban*.