Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
bang cong » dang cong, bang song, hang cong
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau
hoc tien » hoc tieng, hoc vien, hoc tren
tinh cua » trinh cua, sinh cua, tinh chat
cong van » cong vang, cong san, song van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc tien) or (hoc hien)) tinh - hanh ((trinh luan) or (tinh cua)) bang cong van thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tien) OR (hoc hien)) tinh - hanh ((trinh luan) OR (tinh cua)) bang cong van thanh cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) or (hoc hien)) tinh - hanh ((trinh luan) or (tinh cua)) bang cong van thanh cau*.