Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
vi dau » vi dai, va dau, bi dau
x hoi » xa hoi, o hoi, x ho

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: te sach ky nang x hoi. hieu ve cam ((((xuc va) OR (duc va))) OR (thuc day)) hanh vi dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu ve cam ((((xuc va) OR (duc va))) or (thuc day)) hanh vi dau tren~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu ve cam ((((xuc va) OR (duc va))) or (thuc day)) hanh vi dau tren*.