Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien coc » nien cong, vien cac, dien cuc
hanh vai » hanh vi, hanh va, hanh tai
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
luu van » cuu van, luan van, luu hanh
te sai » te tai, te bai, te lai
sai ky » sac ky
luc va » duc va, tuc va, loc va
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang xa hoi. thieu nien coc ((luc va) or (luu van)) hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang xa hoi. thieu nien coc ((luc va) OR (luu van)) hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: te sai ky nang xa hoi. thieu nien coc ((luc va) or (luu van)) hanh vai va triet*.