Perhaps you should try some spelling variations:
goc khien » ngoc chien, hoc hien
sach tham » sach nha
nhin thi » chinh thi, nhanh thi, nhien tai
thi viet » thi lien
tham ngu » pham ngu, thanh ngu, thuat ngu
khien tu » dien tu
te sach » toc sach
tham tu » pham tu, tam tu, tham du
tu viet » su viet, te viet, nu viet

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 tham tu - goc nhin thi viet ) or ( te sach tham ngu - goc khien tu viet ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham tu - goc nhin thi viet ) OR ( te sach tham ngu - goc khien tu viet )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tham tu - goc nhin thi viet ) or ( te sach tham ngu - goc khien tu viet ))*.