Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
thanh le » thinh le, thanh ve, thanh de
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
thuc va » thuc vat, thuc day
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
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 ve cham ((thuc va) OR (thuc dan)) thanh le ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ha hoi. hieu ve cham ((thuc va) OR (thuc dan)) thanh le ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang ha hoi. hieu ve cham ((thuc va) OR (thuc dan)) thanh le ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ha hoi. hieu ve cham ((thuc va) OR (thuc dan)) thanh le ((cua viet) or (cua vat))*.