Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cam » nien giam, trien cam, vien cac
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
xuc van » duc van, luc van, vuc van
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang ha hoi. thieu nien cam xuc van hanh tai ((su triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ha hoi. thieu nien cam xuc van hanh tai ((su triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang ha hoi. thieu nien cam xuc van hanh tai ((su triet) or (va thiet))*.