Perhaps you should try some spelling variations:
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
chat tre » chay tren, chat tai, cho tre
ve chat » va chat, van chat
sach ky » sac ky, sach y, sach ty
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
ha hoi » hoa hoi, xa hoi, va hoi
xuc va » duc va, tuc va, luc va

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 ky lang ((ha hoi) OR (ha noi)). hieu ve chat ((xuc va) or (thuc vat)) hanh tinh chat tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ((ha hoi) OR (ha noi)). hieu ve chat ((xuc va) OR (thuc vat)) hanh tinh chat tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ((ha hoi) OR (ha noi)). hieu ve chat ((xuc va) or (thuc vat)) hanh tinh chat tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ((ha hoi) OR (ha noi)). hieu ve chat ((xuc va) or (thuc vat)) hanh tinh chat tre*.