Perhaps you should try some spelling variations:
doanh ca » doanh cua, doanh cao, doanh va
chua tre » chua tri, cua tre, chua trieu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
luc vay » luc va, luoc van
luc van » luoc van, luu van, duc van
ca chua » ca cua, sua chua
ve cam » ve cham, ve cac, va cam

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 ve cam ((luc vay) or (luc van)) doanh ca chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ve cam ((luc vay) OR (luc van)) doanh ca chua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve cam ((luc vay) or (luc van)) doanh ca chua tre*.