Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach hoi » sach doi, sach moi, cach thoi
hoi nang » hoi lang, ho nang, hoa nang
hanh vai » hanh vi, hanh va, hanh tai
vai cuu » vai cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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 hoi nang x hoi. ((hieu ve) or (hieu va)) cham ((xuc va) OR (tuc va)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoi nang x hoi. ((hieu ve) OR (hieu va)) cham ((xuc va) OR (tuc va)) hanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoi nang x hoi. ((hieu ve) or (hieu va)) cham ((xuc va) OR (tuc va)) hanh vai cuu tre*".