Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
cuu tre » cau treo
cua tre » cua te, cua triet, dua tren
so sach » so sanh, bo sach, co sach
sach ly » sach y, sach lo, sach ty
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
va hanh » van hanh, va thanh, va danh

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

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