Perhaps you should try some spelling variations:
dua tren » dung tren
truc van » truc va, thuc van, truc ban
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
dung co » dung cho, dung cong, dung cua
cuu tre » cua tre, cau tren, cau treo
tuc van » thuc van, tuc va, duc van
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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: vu sach ky nang xa hoi. hieu ve cam ((tuc van) OR (truc van)) dung co ((dua tren) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu ve cam ((tuc van) OR (truc van)) dung co ((dua tren) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ve cam ((tuc van) OR (truc van)) dung co ((dua tren) or (cuu tre))*.