Perhaps you should try some spelling variations:
sach nang » cach mang, sach dung, sach danh
phat khit » chat khi, phai khi, pham thit
chet khit » chat khi
cao nganh » cac nganh, cau nganh, tao nganh
nganh ly » nganh y, nganh ky, nganh xay
su sach » so sach, vu sach
su cao » cu cao, vu cao, su co

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach nang ((phat khit) OR (chet khit)) đong luc ) or ( su cao nganh ly chi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach nang ((phat khit) OR (chet khit)) đong luc ) OR ( su cao nganh ly chi đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach nang ((phat khit) OR (chet khit)) đong luc ) or ( su cao nganh ly chi đong luc ))*".