Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
danh vi » hanh vi, dinh vi, danh di
sac ky » cac ky, sai ky
lao va » tao va, cao va, dao va
bao va » bao ve, tao va, ban va
vi cau » va cau, ve cau, di cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu va cac ((lao va) OR (bao va)) danh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu va cac ((lao va) OR (bao va)) danh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu va cac ((lao va) OR (bao va)) danh vi cau treo*.