Perhaps you should try some spelling variations:
thai nghien » thai nguyen, thi nghiem, phap nghien
khanh thai » nhanh thai, khanh thanh, khanh thuan
nghiem va » nghiep vua, nghiep vu
nghiep va » nghiep vu
van khanh » van thanh, van hanh, van anh
nghien tu » nghiep tu, nghien cuu, nghiep vu
khac thi » khau thi, khuc thi, khuat thi
tu khac » vu khac, su khac, ta khac
tu hoc » te hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu khac thi ((nghiem va) or (nghiep va)) hoc ) or ( van khanh thai nghien tu hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu khac thi ((nghiem va) OR (nghiep va)) hoc ) OR ( van khanh thai nghien tu hoc )).
• Adding a wildcard symbol may retrieve word variants: (( tu khac thi ((nghiem va) or (nghiep va)) hoc ) or ( van khanh thai nghien tu hoc ))*.