Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach nganh » sach ngan, sach tranh, cac nganh
thuat hoa » thuat toan, thuyet hoa, thuat do
kxy thuat » ky thuat, ky thua
tranh ki » trinh ki, thanh kim, tranh cai
ki thuat » ky thuat
my thuat » ky thuat, va thuat
te canh » ve canh, te danh, re canh
va hoc » van hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te canh tranh ki thuat hoa hoc ) or ( thuat sach nganh ((kxy thuat) OR (my thuat)) va hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te canh tranh ki thuat hoa hoc ) OR ( thuat sach nganh ((kxy thuat) OR (my thuat)) va hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te canh tranh ki thuat hoa hoc ) or ( thuat sach nganh ((kxy thuat) OR (my thuat)) va hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( te canh tranh ki thuat hoa hoc ) or ( thuat sach nganh ((kxy thuat) OR (my thuat)) va hoc ))*.