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 dung » cuong dung, cong dong, cong luong
trang va » hang va
tran van » luan van
dung van » duong van, dung va, dang van

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 ((trang va) OR (tran van)) thong cong dung van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trang va) OR (tran van)) thong cong dung van ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trang va) OR (tran van)) thong cong dung van ban*.