Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
hanh va » hang va, hanh vi
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua
cua te » cua tu

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 xa hoi. hieu van cam ((luc va) or (thuc va)) hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo nang xa hoi. hieu van cam ((luc va) OR (thuc va)) hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: te sach lo nang xa hoi. hieu van cam ((luc va) or (thuc va)) hanh va cua te*.