Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
hoc bao » hoc cao, hoc bo, hoc giao
hoc bai » hoc dai, hoc giai
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu va chat ((hoc bao) OR (hoc bai)) hanh vi ((cua te) OR (cua cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu va chat ((hoc bao) OR (hoc bai)) hanh vi ((cua te) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu va chat ((hoc bao) OR (hoc bai)) hanh vi ((cua te) OR (cua cu))*.