Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » tinh chat, tranh cua, tinh thua
sinh cua » manh cua, dinh cuu, sinh va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » 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) or (((tinh cua) or (sinh cua)))) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trinh cua) OR (((tinh cua) OR (sinh cua)))) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trinh cua) or (((tinh cua) or (sinh cua)))) nhung cong dan toan cau*.