Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chinh cua » chinh ca, chinh sua, chinh luan
cuong tap » cong tac, luong tai, cong tan
luong tap » luong tai, luong tham, luong thai
ho chieu » theo chieu, hoc thieu, doi chieu
hinh cua » sinh cua, tinh cua, dinh cua
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((hinh cua) OR (chinh cua)) hung ((cuong tap) OR (luong tap)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((hinh cua) or (chinh cua)) hung ((cuong tap) OR (luong tap)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((hinh cua) or (chinh cua)) hung ((cuong tap) OR (luong tap)) toan cao*.