Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
cach nganh » cac nganh, cach nhanh, cac ngan
nganh hoc » nganh hoa, nganh soc, nganh duoc
hoc sach » hoc sinh, hoc cac, hoc anh
nganh ha » nganh hoa, nganh hai, nhanh ha
tu cach » tu cac
hoc ki » hoc ky, hoc kinh, hoc khoi
ha thi » pham thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((thuoc sach) OR (hoc sach)) nganh hoc ki đong luc ) or ( tu cach nganh ha thi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((thuoc sach) OR (hoc sach)) nganh hoc ki đong luc ) OR ( tu cach nganh ha thi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((thuoc sach) OR (hoc sach)) nganh hoc ki đong luc ) or ( tu cach nganh ha thi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((thuoc sach) OR (hoc sach)) nganh hoc ki đong luc ) or ( tu cach nganh ha thi đong luc ))*.