Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
thuc va » thuc vat, thuc day
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
sach lo » sach dao, sach doi, sach hoi
van cam » van nam, van lam, van cau
lo nang » ho nang, ly nang, loai nang
di cua » dai cua, doi cua, de cua
tuc va » truc va, tuc xa, duc va
x hoi » xa hoi, o hoi, x ho

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 lo nang x hoi. hieu van cam ((tuc va) or (((thuc va) OR (thuc dan)))) hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo nang x hoi. hieu van cam ((tuc va) OR (((thuc va) OR (thuc dan)))) hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach lo nang x hoi. hieu van cam ((tuc va) or (((thuc va) OR (thuc dan)))) hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach lo nang x hoi. hieu van cam ((tuc va) or (((thuc va) OR (thuc dan)))) hanh di cua viet*.