Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sang tao » hang tai
hanh tai » thanh tai, hang tai, han tai
cau tren » cu tren, dau tren, ca tren
sang mai » sang ma, sang tai, lang mai
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau treo
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
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: thuat sach ky ((sang mai) or (sang tao)) hoi. hieu ve cam xuc va hanh tai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((sang mai) OR (sang tao)) hoi. hieu ve cam xuc va hanh tai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((sang mai) or (sang tao)) hoi. hieu ve cam xuc va hanh tai ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((sang mai) or (sang tao)) hoi. hieu ve cam xuc va hanh tai ((cuu tre) OR (cau tren))*.