Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chua tre » chua tri, cua tre, chua trieu
vien cac » vien bach, vien dai, vien da
sang mai » sang ma, sang tai, lang mai
ca chua » ca cua, sua chua
hanh ca » hanh cac, hanh cat, hanh cua
va hanh » van hanh, va thanh, va danh
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa
ve cac » va cac

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 sach)) ky sang mai hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh ca chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky sang mai hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh ca chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat sach)) ky sang mai hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh ca chua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky sang mai hoi. hieu ((ve cac) OR (vien cac)) tuc va hanh ca chua tre*.