Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van dinh » van minh, van dich, xuan dinh
nang xa » nang x, lang xa, nang ma
vien da » vien dai, hien dai
va dinh » va kinh, va tinh, vu dinh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te lai
sai ky » sac ky
da lop » ba lop

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. hieu vien da lop ((va dinh) OR (van dinh)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang xa hoi. hieu vien da lop ((va dinh) OR (van dinh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang xa hoi. hieu vien da lop ((va dinh) OR (van dinh)) vai cua tre*.