Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh vat » trinh van, trinh luat, sinh vat
nang cong » nang song, dang cong, bang cong
dung cong » dung trong
hach toan » thanh toan, manh toan
cua tinh » cua sinh, va tinh, ha tinh
toan cau » toan cao, toan ban, toan tap
hoa cua » hoa chat, hoa xuat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoa cua tinh - hanh trinh vat ((nang cong) or (dung cong)) hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoa cua tinh - hanh trinh vat ((nang cong) OR (dung cong)) hach toan cau.
• Adding a wildcard symbol may retrieve word variants: hoa cua tinh - hanh trinh vat ((nang cong) or (dung cong)) hach toan cau*.