Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doi chi, ho chieu, mot chieu
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cong san » cong tac
san tuan » van tuan, san luan, san quan
tuan tap » toan tap, tuan tai, tuyen tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doc hieu)) xanh - hanh ((trinh quan) or (tinh cua)) tong cong san tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - hanh ((trinh quan) OR (tinh cua)) tong cong san tuan tap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) xanh - hanh ((trinh quan) or (tinh cua)) tong cong san tuan tap*.