Perhaps you should try some spelling variations:
dang hai » dang khai, hang hai, dung hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
vu cham » va cham, vu kham, tu cham
nang xa » nang x, lang xa, nang ma
ca tren » cau tren, cu tren, la tren
ve cac » va cac, vien cac
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
hai ca » hai cua, hai ba, bai ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu ((vu cham) or (ve cac)) ((xuc va) or (tuc va)) dang hai ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((vu cham) OR (ve cac)) ((xuc va) OR (tuc va)) dang hai ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((vu cham) or (ve cac)) ((xuc va) or (tuc va)) dang hai ca tren*.