Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
luat chung » luan chung, luat thuong, cua chung
trinh toan » tinh toan, thanh toan, trinh quan
hoc thieu » toc thieu, hoc hien
luat dung » suat dung, luat quang, thuat dung
trinh han » trinh quan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh ((luat dung) OR (luat chung)) cong ((trinh toan) OR (trinh han)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trinh ((luat dung) or (luat chung)) cong ((trinh toan) OR (trinh han)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh ((luat dung) or (luat chung)) cong ((trinh toan) OR (trinh han)) ban*.