Perhaps you should try some spelling variations:
luoc dai » cuoc doi, hoc dai, duc dai
tao khoi » tao hoi, thao khoa, lao khoa
cuu tre » cua tre, cau tren, cau treo
ky sang » ky nang, ky tang, duy sang
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
duc van » duc va, duc tan, duc manh
di cuu » di cau, di cua, dinh cuu
te sac » te sach, te cac, te san
ve cac » va cac, vien 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 sac ((ky sang) OR (ky dang)) tao khoi. hieu ve cac ((duc van) or (luoc dai)) hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky sang) OR (ky dang)) tao khoi. hieu ve cac ((duc van) OR (luoc dai)) hanh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky sang) OR (ky dang)) tao khoi. hieu ve cac ((duc van) or (luoc dai)) hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky sang) OR (ky dang)) tao khoi. hieu ve cac ((duc van) or (luoc dai)) hanh di cuu tre*.