Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
toan cao » toan tap
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: toc thieu sach - hanh trinh cua ((nhung cong) OR (hang cong)) san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - hanh trinh cua ((nhung cong) OR (hang cong)) san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - hanh trinh cua ((nhung cong) OR (hang cong)) san ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - hanh trinh cua ((nhung cong) OR (hang cong)) san ((toan cao) or (toan ban))*.