Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, anh thai
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
lo ban » co ban, lo van, ly ban
me hoi » le hoi
cac lo » cac lop, cac co, cac bo

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((me hoi) or (ma hoa)). hieu ve cac lo ban ((hanh thai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((me hoi) OR (ma hoa)). hieu ve cac lo ban ((hanh thai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((me hoi) or (ma hoa)). hieu ve cac lo ban ((hanh thai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((me hoi) or (ma hoa)). hieu ve cac lo ban ((hanh thai) OR (hanh tai)) cua tre*.