Perhaps you should try some spelling variations:
te sach » toc sach
danh du » danh dau, danh tu, dinh du
danh di » xanh di, danh dien, danh gia
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cuu tre » cua tre, cau tren, cau treo
sach 2 » sach y
soc va » hoc va, loc va, doc va

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 2 ((nang xa) or (lang xa)) hoi. hieu vu cham soc va ((danh di) OR (danh du)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 2 ((nang xa) OR (lang xa)) hoi. hieu vu cham soc va ((danh di) OR (danh du)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 2 ((nang xa) or (lang xa)) hoi. hieu vu cham soc va ((danh di) OR (danh du)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach 2 ((nang xa) or (lang xa)) hoi. hieu vu cham soc va ((danh di) OR (danh du)) cuu tre*.