Perhaps you should try some spelling variations:
thu nghiem » thuc nghiem
thi nghiem » thuc nghiem
nghiem vi » nghiem va, nghiem thi, nghiem van
thi hanh » thi thanh
hanh thu » khanh thu, nhanh thu, thanh thu
nghiem d » nghiem de, nghiem do, nghiem _
tu hanh » du hanh, lu hanh, luu hanh
vi hoc » li hoc, va hoc
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thi hanh thu nghiem vi hoc ) or ( ((tu hanh) or (thuc hanh)) thi nghiem d hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thi hanh thu nghiem vi hoc ) OR ( ((tu hanh) OR (thuc hanh)) thi nghiem d hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thi hanh thu nghiem vi hoc ) or ( ((tu hanh) or (thuc hanh)) thi nghiem d hoc ))*.