Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
lam xuc » cam xuc, lam duoc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

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) OR (nang ma)) hoi. ((hieu van) or (thien van)) lam xuc va danh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) OR (thien van)) lam xuc va danh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) or (thien van)) lam xuc va danh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) or (thien van)) lam xuc va danh vi cau tren*.