Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
trinh qua » trinh quan, trinh cua, trinh quang
qua nhung » quan nhung, cua nhung, qua chung
chi xanh » chi anh, chi danh, chi hanh
cong san » cong tac
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - hanh trinh qua nhung cong san ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh trinh qua nhung cong san ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh trinh qua nhung cong san ((toan ban) OR (van ban))*.