Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong luong » cong thuong, nang luong, cong cong
trinh van » trinh han, trinh quan, trinh toan
chu sach » thu sach, chieu sach, chuc hach
cau sach » cao sach, hau sach, rau sach
thi toan » thi tran, thi hoan, thi loan
toan ban » van ban

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) OR (cau sach)) - hanh trinh van ((cong luong) or (cong dong)) thi toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (cau sach)) - hanh trinh van ((cong luong) OR (cong dong)) thi toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) OR (cau sach)) - hanh trinh van ((cong luong) or (cong dong)) thi toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) OR (cau sach)) - hanh trinh van ((cong luong) or (cong dong)) thi toan ban*.