Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hien sach » dien sach, kien sach, chieu sach
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) OR (thien hach)) - hanh trinh cua thong cong san phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (thien hach)) - hanh trinh cua thong cong san phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (thien hach)) - hanh trinh cua thong cong san phan tap*.