Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh dan » thanh dan, hanh san, canh dan
nang van » dang van, tang van, lang van
thai vat » thai van, thai va, thai hat
thi vat » thi van, phi vat, thi va
dan cua » dan ca, ban cua, dai cua
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (te sach)) ky nang van hoa. lieu va cao ((thi vat) OR (thai vat)) hanh dan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (te sach)) ky nang van hoa. lieu va cao ((thi vat) OR (thai vat)) hanh dan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (te sach)) ky nang van hoa. lieu va cao ((thi vat) OR (thai vat)) hanh dan cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (te sach)) ky nang van hoa. lieu va cao ((thi vat) OR (thai vat)) hanh dan cua tre*.