Perhaps you should try some spelling variations:
trinh cua » trinh luat, trinh quan, trinh luan
dang cong » dung cong
chi sang » chi lang, chieu sang, chi chang
tinh cua » sinh cua, tinh chat, tranh cua
cong tan » cong tac, cong san, cong thanh
doi chi » doi khi
tan san » tai san, tan van, han san
san cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - hanh ((trinh cua) or (tinh cua)) dang cong tan san cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - hanh ((trinh cua) OR (tinh cua)) dang cong tan san cau*.