Perhaps you should try some spelling variations:
sang tao » hang tai
tang tai » hang tai, dung tai, dong tai
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
thue va » thuyet va, thuc vat, thuat va
y nang » ky nang, ly nang, v nang
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: tu sach y nang xa hoi. lieu va cam ((thue va) or (thuc va)) ((tang tai) OR (sang tao)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. lieu va cam ((thue va) OR (thuc va)) ((tang tai) OR (sang tao)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. lieu va cam ((thue va) or (thuc va)) ((tang tai) OR (sang tao)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cam ((thue va) or (thuc va)) ((tang tai) OR (sang tao)) cua tre*.