Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, duc van
xuc van » duc van, xuc ban, thuc van
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
vu sach » vu bach, su sach, vu khach
ha hoi » hoa hoi, ha noi, xa hoi
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (vu sach)) ky dang ha hoi. hieu ve cam ((xuc van) or (luc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (vu sach)) ky dang ha hoi. hieu ve cam ((xuc van) OR (luc van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (vu sach)) ky dang ha hoi. hieu ve cam ((xuc van) or (luc van)) hanh vi cua tre*.