Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
ly nang » ky nang, ly hang, ly vang
danh du » danh dau, danh tu, dinh du
sach ly » sach y, sach lo, sach ty
tuc va » truc va, tuc xa, duc va
va lam » van lam, va lap
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 ly nang o hoi. lieu va lam ((tuc va) OR (thuc va)) danh du ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang o hoi. lieu va lam ((tuc va) OR (thuc va)) danh du ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang o hoi. lieu va lam ((tuc va) OR (thuc va)) danh du ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang o hoi. lieu va lam ((tuc va) OR (thuc va)) danh du ((cua viet) or (cua vat))*.