Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dau tieng » dau tien, cau tieng, day tieng
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
va cau » van cau, va dau, va cao
de dau » dem dau, de dao, de dat

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 ky nang xa hoi. lieu ((va cau) or (va cac)) tuc ((va hanh) OR (van hanh)) de dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. lieu ((va cau) OR (va cac)) tuc ((va hanh) OR (van hanh)) de dau tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. lieu ((va cau) or (va cac)) tuc ((va hanh) OR (van hanh)) de dau tieng".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. lieu ((va cau) or (va cac)) tuc ((va hanh) OR (van hanh)) de dau tieng*.