Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
xanh doi » xanh di, thanh doi, tinh doi
cua tre » cua te, cuu tre, dua tren
va xanh » va danh, va hanh, va anh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach v » sach va, sach y, sach vay
soc va » hoc va, loc va, doc va
sach 2 » sach y
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 v) or (sach 2)) nang x hoi. hieu vu cham soc va xanh doi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach 2)) nang x hoi. hieu vu cham soc va xanh doi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach 2)) nang x hoi. hieu vu cham soc va xanh doi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach 2)) nang x hoi. hieu vu cham soc va xanh doi ((cua tre) OR (cua triet))*.