Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
nganh xay » nganh mac, nganh y, nganh ma
thu sach » tu sach, thuat sach, thuoc sach
san hanh » san thanh, ban hanh, van hanh
xay chi » xay chen
thu san » thuy san, thu ban, phu san
ky khi » ky thi
ly khi » ly chi

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

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