Perhaps you should try some spelling variations:
xa nghiem » xet nghiem, van nghiem, va nghien
nghiem ad » nghiem d, nghiem ban, nghiem lam
thu sach » thuat sach, thuoc sach, thu hoach
sach dao » lanh dao
che duoc » che thuoc, che do, te duoc
duoc hoc » quoc hoi
tu sach » su sach, te sach, tu cach
sach xa » sach nha, sach bai
dao che » bao che, dao cho, dao chu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach xa nghiem ad hoc ) or ( thu sach dao che duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach xa nghiem ad hoc ) OR ( thu sach dao che duoc hoc ))*.