Perhaps you should try some spelling variations:
hanh hoc » thanh hoc, hinh hoc, anh hoc
le hoang » le hong, le quang, le tang
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
tu hanh » du hanh, lu hanh, thuc hanh
va phan » van phan, va phat, va phap
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu hanh hoc tap, nghien ((cuu van) or (le hoang)) hoc dan khoa hoc xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hanh hoc tap, nghien ((cuu van) OR (le hoang)) hoc dan khoa hoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: tu hanh hoc tap, nghien ((cuu van) or (le hoang)) hoc dan khoa hoc xa hoi va phan van*.