Perhaps you should try some spelling variations:
sang tao » hang tai
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
ca tren » cau tren, cu tren, la tren
ve cac » va cac, vien cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky sang tao hoi. hieu ve cac duc va hanh lai ((cua te) or (((cuu tre) or (ca tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang tao hoi. hieu ve cac duc va hanh lai ((cua te) OR (((cuu tre) OR (ca tren)))).
• Adding a wildcard symbol may retrieve word variants: su sach ky sang tao hoi. hieu ve cac duc va hanh lai ((cua te) or (((cuu tre) or (ca tren))))*.