Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trong san » trong cac, cong san, dong san
va tuong » va thong, xa truong, va phuong
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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 ((va tuong) OR (va thuong)) trong san toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trinh ((va tuong) OR (va thuong)) trong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh ((va tuong) OR (va thuong)) trong san toan tap*.