Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hanh trinh » canh tranh, hanh chinh
trinh van » trinh han, trinh quan, trinh toan
luong thi » luong tai
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
van cong » van dong, van phong, phan cong
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 sach - hanh trinh van cong luong thi ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - hanh trinh van cong luong thi ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh trinh van cong luong thi ((toan cau) OR (toan cao))*.