Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
long hoa » long khoa, luong hoa, dong hoa
dan dinh » dang dinh, doan dinh, van dinh
thuc dan » thuc hanh, hoc dan, thuc vat
dinh vi » dinh ve, dinh viet, dinh tri
so sach » so sanh, bo sach, co sach
sach sy » sach y, sach ty, sach hay
ve cham » va cham, ve chat, vu cham
hoa hoi » khoa hoi, hoa hoc, hoa doi
sy long » sy luong, quy long
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: so sach sy long hoa hoi. hieu ((ve cham) or (va cam)) thuc dan dinh vi ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach sy long hoa hoi. hieu ((ve cham) OR (va cam)) thuc dan dinh vi ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: so sach sy long hoa hoi. hieu ((ve cham) or (va cam)) thuc dan dinh vi ((dua tren) or (cua triet))*.