Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam xuc » cam xuc, lam duoc
van lam » van nam
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
tu sach » thu sach, su sach, te sach
de cua » le cua, te cua, dieu cua
tu sac » tu cac, tu san, tu bac

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