Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
loai cuu » loai cua, lai cua, loai cay
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
ty lang » tay lang, ty hang, tu lang
cuu tre » cua tre, cau tren, cau treo
va cau » van cau, va cac, va dau
va dan » va dao, va dau, va dap
ca dan » cac dan, ca 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 ((ty lang) OR (ty xang)) xa hoi. hieu va cau luc ((va dan) or (ca dan)) loai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ty lang) OR (ty xang)) xa hoi. hieu va cau luc ((va dan) OR (ca dan)) loai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ty lang) OR (ty xang)) xa hoi. hieu va cau luc ((va dan) or (ca dan)) loai cuu tre*".