Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
tinh cua » trinh cua, sinh cua, tinh chat
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
hoi chu » hoi chuc
o chau » a chau, 3 chau, moc chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoi chu) or (o chau)) tinh - hanh ((trinh luan) or (tinh cua)) nhung cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoi chu) OR (o chau)) tinh - hanh ((trinh luan) OR (tinh cua)) nhung cong van toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoi chu) or (o chau)) tinh - hanh ((trinh luan) or (tinh cua)) nhung cong van toan cao*.