Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, dat nuoc, cua nuoc
hanh dai » hanh dao, vanh dai, thanh dat
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 ((cac nuoc) or (hoc nuoc)) van ((hanh dai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu va ((cac nuoc) OR (hoc nuoc)) van ((hanh dai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu va ((cac nuoc) or (hoc nuoc)) van ((hanh dai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu va ((cac nuoc) or (hoc nuoc)) van ((hanh dai) OR (hanh tai)) cua tre*.