Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh trinh » canh tranh, hanh trinh, canh tinh
phong cong » phong chong, thong cong, chong cong
trinh vat » trinh van, trinh luat, sinh vat
vat phong » van phong, va phong, vat khong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
pham cau » phan cau, pham ca, pha cau
pham can » pham van, pham lan, pham ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu tinh - canh trinh vat phong cong tac ((pham cau) or (pham can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - canh trinh vat phong cong tac ((pham cau) OR (pham can)).
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - canh trinh vat phong cong tac ((pham cau) or (pham can))*.