Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
nam xuc » cam xuc, nam xua, nam thuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet

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) or (hoc cac)) ky nang xa hoi. thien van nam xuc ((va hanh) OR (va danh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc cac)) ky nang xa hoi. thien van nam xuc ((va hanh) OR (va danh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc cac)) ky nang xa hoi. thien van nam xuc ((va hanh) OR (va danh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc cac)) ky nang xa hoi. thien van nam xuc ((va hanh) OR (va danh)) dai cua tre*.