Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
dan toan » van toan, dan than, manh toan
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: hoc thieu sach - hanh trinh cua ((nhung cong) OR (dung cong)) dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trinh cua ((nhung cong) OR (dung cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh cua ((nhung cong) OR (dung cong)) dan toan cao*.