Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
tang ma » mang may, tang van
hieu ve » hieu va
cac xuc » cam xuc, cac nuoc, chat xuc
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang x) OR (tang ma)) hoi. ((hieu ve) OR (hieu van)) cac xuc va hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang x) or (tang ma)) hoi. ((hieu ve) OR (hieu van)) cac xuc va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang x) or (tang ma)) hoi. ((hieu ve) OR (hieu van)) cac xuc va hanh vi cua te*.