Perhaps you should try some spelling variations:
sach tranh » canh tranh
hoc nhanh » hoc nganh, hoc phan
nhanh kxy » hanh ky, nhan ky, nganh ky
kxy thuat » my thuat, ky thua
thuat va » thuyet va, thuat xay, thuat bai
te sach » toc sach
thu hoc » tu hoc, thu hoi, tru hoc
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 sach tranh ((ki thuat) or (ky thuat)) hoa hoc ) or ( thu hoc nhanh kxy thuat va hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tranh ((ki thuat) OR (ky thuat)) hoa hoc ) OR ( thu hoc nhanh kxy thuat va hoc )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tranh ((ki thuat) or (ky thuat)) hoa hoc ) or ( thu hoc nhanh kxy thuat va hoc ))*.