Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
va sinh » va kinh, va tinh, vi sinh
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
sinh va » sinh vat, tinh va, dinh van
van am » van nam, van lam, van dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang ha noi. hieu van am thuc va sinh va ((dua tren) or (((cuu tre) or (cau triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ha noi. hieu van am thuc va sinh va ((dua tren) OR (((cuu tre) OR (cau triet)))).
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ha noi. hieu van am thuc va sinh va ((dua tren) or (((cuu tre) or (cau triet))))*.