Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan tap » phan lap, han tap, pha tap
san he » dan he, san ho, van he
san ha » van ha, son ha, san va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((san he) OR (san ha)) thong cong tan phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((san he) OR (san ha)) thong cong tan phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((san he) OR (san ha)) thong cong tan phan tap*.