Perhaps you should try some spelling variations:
trong hanh » trong thanh, trong anh, trong canh
toc sach » hoc sach, doc sach, thuoc sach
lon hanh » lon thanh, hon hanh, son thanh
ton hanh » toan hanh, hon hanh, son thanh
cac duc » cac du, cao duc, cac dac
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
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: toc sach ky nang xa hoi. hieu ve cac duc ((((ton hanh) OR (trong hanh))) or (lon hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu ve cac duc ((((ton hanh) OR (trong hanh))) OR (lon hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. hieu ve cac duc ((((ton hanh) OR (trong hanh))) or (lon hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu ve cac duc ((((ton hanh) OR (trong hanh))) or (lon hanh)) vai cua tre*.