Perhaps you should try some spelling variations:
trinh han » trinh quan
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban
theo te » theo tu, theo tieu, theo yeu
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo te sach - hanh ((trinh han) or (trinh vat)) hang cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo te sach - hanh ((trinh han) OR (trinh vat)) hang cong manh toan ban*.