Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
tu sac » tu cac, tu san, tu bac
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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 (tu sach)) ky lang xa hoi. hieu ve cam ((xuc van) OR (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky lang xa hoi. hieu ve cam ((xuc van) OR (duc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu sach)) ky lang xa hoi. hieu ve cam ((xuc van) OR (duc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky lang xa hoi. hieu ve cam ((xuc van) OR (duc van)) hanh vi cua tre*.