Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cua tre » cua te, cuu tre, cua triet
ky lang » ky dang, ky tang, tay lang
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
luc va » duc va, tuc va, loc va
te sac » te sach, te cac, te san
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cham)) luc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) OR (va cham)) luc va hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cham)) luc va hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cham)) luc va hanh tai cua tre*.