Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
van hanh » van thanh, ban hanh, van ban
dau tren » dau tien, dat tren, dau tieng
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
cau xuc » cam xuc, cau luc, cau truc
van anh » van thanh, tuan anh, van minh
y mang » cay mang
vi dau » vi dai, va dau, bi dau
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (thuat san)) y mang xa hoi. hieu va cau xuc ((van hanh) OR (van anh)) vi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat san)) y mang xa hoi. hieu va cau xuc ((van hanh) OR (van anh)) vi dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (thuat san)) y mang xa hoi. hieu va cau xuc ((van hanh) OR (van anh)) vi dau tren".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuat san)) y mang xa hoi. hieu va cau xuc ((van hanh) OR (van anh)) vi dau tren*.