Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
te sach » toc sach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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) or (thuat lanh)) ky ((mang may) or (lang ha)) hoi. hieu va cam duc ban thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat lanh)) ky ((mang may) OR (lang ha)) hoi. hieu va cam duc ban thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat lanh)) ky ((mang may) or (lang ha)) hoi. hieu va cam duc ban thanh di cua tre*.