Perhaps you should try some spelling variations:
cac tinh » dac tinh, cuu tinh, ha tinh
duoc tuc » duoc tu, duoc muc, duoc duoc
cua tre » cua te, cuu tre, cua triet
ca tinh » cua tinh, va tinh, ha tinh
hieu ve » hieu va, hieu van
ve duoc » te duoc, ve nuoc, che duoc
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su xac » pu xac, su cac
va cua » va chua, via cua, ca cua
su sac » su sach, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky lang xa hoi. hieu ve duoc tuc ((ca tinh) OR (cac tinh)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky lang xa hoi. hieu ve duoc tuc ((ca tinh) OR (cac tinh)) va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) or (su xac)) ky lang xa hoi. hieu ve duoc tuc ((ca tinh) OR (cac tinh)) va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky lang xa hoi. hieu ve duoc tuc ((ca tinh) OR (cac tinh)) va cua tre*.