Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
dau tren » dau tien, dat tren, dau tieng
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
y mang » cay mang
va cau » van cau, va cac, va dau
vi dau » vi dai, va dau, bi 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 truc van hanh 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 truc van hanh vi dau tren.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuat san)) y mang xa hoi. hieu va cau truc van hanh vi dau tren*.