Perhaps you should try some spelling variations:
dam thuc » am thuc, dan thuc, nam thuc
hanh dao » thanh dat, thanh dam, doanh dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te lai
sai ky » sac ky
cam tu » cam thu, nam tu, dam tu

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 va ((dam thuc) or (cam tu)) va ((hanh dao) OR (lanh dao)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang xa hoi. hieu va ((dam thuc) OR (cam tu)) va ((hanh dao) OR (lanh dao)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang xa hoi. hieu va ((dam thuc) or (cam tu)) va ((hanh dao) OR (lanh dao)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang xa hoi. hieu va ((dam thuc) or (cam tu)) va ((hanh dao) OR (lanh dao)) cua tre*.