Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh tri » thanh tri, hanh tai, hanh trinh
dang xay » dang van, van xay
tri cau » tri cac, tri dau, trinh cau
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
te sach » toc sach
va cam » va cham, va cac, va cao
te sac » te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te sach)) ky dang xay hoi. hieu va cam ((thuc va) or (hoc va)) hanh tri cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky dang xay hoi. hieu va cam ((thuc va) OR (hoc va)) hanh tri cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky dang xay hoi. hieu va cam ((thuc va) or (hoc va)) hanh tri cau treo".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky dang xay hoi. hieu va cam ((thuc va) or (hoc va)) hanh tri cau treo*.