Perhaps you should try some spelling variations:
thai nghien » thai nguyen, phap nghien, phan nghien
thi nghiem » thuc nghiem
nghiem van » nghiem va, nghiem ban, nghiep van
khuat thai » chat thai, khuan thao, luat thai
nghien tu » nghiep tu, nghien cuu, nghiep vu
su khuat » su phat, su luat, su hoat
ta khuat » tam thuat, va thuat, ma thuat
van hoc » van hoa
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: (( su khuat thi nghiem van hoc ) or ( ta khuat thai nghien tu hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su khuat thi nghiem van hoc ) OR ( ta khuat thai nghien tu hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su khuat thi nghiem van hoc ) or ( ta khuat thai nghien tu hoc ))*.