Perhaps you should try some spelling variations:
hanh di » hanh de, hang di, danh di
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach thu, xach tay
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((sach ty) OR (sach tu)) nang xa hoi. hieu va cam tuc van ((hanh di) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach ty) OR (sach tu)) nang xa hoi. hieu va cam tuc van ((hanh di) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((sach ty) OR (sach tu)) nang xa hoi. hieu va cam tuc van ((hanh di) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach ty) OR (sach tu)) nang xa hoi. hieu va cam tuc van ((hanh di) or (hanh vi)) cua tre*.