Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien coc » nien cong, vien cac, dien cuc
luu hanh » huu han
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
luu van » cuu van, luan van
te sai » te tai, te bai, te lai
sai ky » sac ky
luc va » duc va, tuc va, loc va
vi va » vi van, vai va, vu 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) OR (luu hanh)))) hanh vi 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) OR (luu hanh)))) hanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang xa hoi. thieu nien coc ((luc va) or (((luu van) OR (luu hanh)))) hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang xa hoi. thieu nien coc ((luc va) or (((luu van) OR (luu hanh)))) hanh vi va triet*.