Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dau tren » dau tien, dat tren, dau tieng
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
va cau » van cau, va dau, va cao
luc va » duc va, tuc va, loc va
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)) luc va hanh de dau tren~.
• 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)) luc va hanh de dau tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. lieu ((va cau) OR (va cac)) luc va hanh de dau tren*.