Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
tung dai » trung dai, tuong dai, tung dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh tung dai ((dung cong) or (thong cong)) dan ((than cao) OR (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung dai ((dung cong) OR (thong cong)) dan ((than cao) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh tung dai ((dung cong) or (thong cong)) dan ((than cao) OR (than cap))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung dai ((dung cong) or (thong cong)) dan ((than cao) OR (than cap))*.