Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
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
cau xuc » cau truc, chat xuc, cau phuc
cau luc » cau truc, cau phuc
y mang » cay mang
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 y mang xa hoi. hieu va ((((cau xuc) OR (cam xuc))) or (cau luc)) van hanh vi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y mang xa hoi. hieu va ((((cau xuc) OR (cam xuc))) OR (cau luc)) van hanh vi dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y mang xa hoi. hieu va ((((cau xuc) OR (cam xuc))) or (cau luc)) van hanh vi dau tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach y mang xa hoi. hieu va ((((cau xuc) OR (cam xuc))) or (cau luc)) van hanh vi dau tren*.