Perhaps you should try some spelling variations:
trinh cua » trinh luat, trinh quan, trinh luan
hang nong » thang long, han tong
chu xanh » chu manh, chieu xanh, chua xang
tinh cua » sinh cua, tinh chat, tranh cua
nong tac » cong tac, dong tac, nong tan
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (chu han)) - hanh ((tinh cua) or (trinh cua)) hang nong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chu han)) - hanh ((tinh cua) OR (trinh cua)) hang nong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chu han)) - hanh ((tinh cua) or (trinh cua)) hang nong tac toan ban*.