Perhaps you should try some spelling variations:
thanh le » thinh le, thanh ve, thanh de
thuc day » thuc dan, thuc vat
te sach » toc sach
ca viet » va viet, co viet, hoa viet
thuc va » thuc vat, thuc dan
sach ty » sach y, sach tu, sach thu
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
xang ha » lang ha, tang ha, dang ha
ha hoi » hoa hoi, ha noi, xa hoi

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 ty xang ha hoi. hieu va tham ((thuc va) OR (thuc day)) thanh le ((ca viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ha hoi. hieu va tham ((thuc va) OR (thuc day)) thanh le ((ca viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang ha hoi. hieu va tham ((thuc va) OR (thuc day)) thanh le ((ca viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ha hoi. hieu va tham ((thuc va) OR (thuc day)) thanh le ((ca viet) or (cua vat))*.