Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
dieu sach » dien sach, chieu sach, dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
hoc dieu » hoc thieu, hoc hien
hanh han » hanh nhan, hanh phan, hanh san
cong tan » cong tac, cong san, cong thanh
tan pham » tuan pham, san pham, tac pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu sach - ((hanh mang) or (hanh han)) va nhung cong tan pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu sach - ((hanh mang) OR (hanh han)) va nhung cong tan pham van.
• Adding a wildcard symbol may retrieve word variants: hoc dieu sach - ((hanh mang) or (hanh han)) va nhung cong tan pham van*.