Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
chau tinh » cuu tinh, ha tinh, cua tinh
bang cong » dang cong, bang song, hang cong
hoc chau » hoc chat, moc chau, hoc cau
manh cua » doanh cua, ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chau tinh - hanh ((trinh quan) or (manh cua)) bang cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chau tinh - hanh ((trinh quan) OR (manh cua)) bang cong tan toan cau*.