Perhaps you should try some spelling variations:
thoi nghiem » thi nghiem, khoi nghiep, thuc nghiem
thuat sach » thuat lanh, thuat san
mai nghiep » lam nghiep, xi nghiep, cac nghiep
cach thoi » cac thoi, cach thuc, cach noi
nghiem te » nghiem de, nghiem ve, nghiem tien
nghiep te » nghiep ke, nghiep tu, nghiep he
thu sach » tu sach, thuoc sach, thu hoach
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach thoi nghiem te hoc ) or ( ((thu sach) or (thuat sach)) mai nghiep te hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thoi nghiem te hoc ) OR ( ((thu sach) OR (thuat sach)) mai nghiep te hoc )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thoi nghiem te hoc ) or ( ((thu sach) or (thuat sach)) mai nghiep te hoc ))*.