Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, trung cua, thang cua
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, tang luan
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: hoc thieu sach - hanh ((trang cua) OR (tang cua)) ((thong cong) or (cong dong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trang cua) OR (tang cua)) ((thong cong) OR (cong dong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh ((trang cua) OR (tang cua)) ((thong cong) or (cong dong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trang cua) OR (tang cua)) ((thong cong) or (cong dong)) manh toan ban*.