Perhaps you should try some spelling variations:
chet khit » chat khi
cao nganh » cac nganh, cau nganh, tao nganh
sach han » sach tham, sach danh, sach nang
nganh ma » nganh mac, nganh hoa, nganh y
su sach » so sach, vu sach
che khi » che khoa, chat khi
su cao » cu cao, vu cao, su co
ma khi » va khi, my khi

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 han ((che khi) OR (chet khit)) đong luc ) or ( su cao nganh ma khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach han ((che khi) OR (chet khit)) đong luc ) OR ( su cao nganh ma khi đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach han ((che khi) OR (chet khit)) đong luc ) or ( su cao nganh ma khi đong luc ))*".