Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
thi cuc » tai cuc
cuc tre » duc tre, cua tre, cuu tre

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 nang xa hoi. thi van cac duc ((va danh) OR (va dinh)) thi cuc tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. thi van cac duc ((va danh) OR (va dinh)) thi cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thi van cac duc ((va danh) OR (va dinh)) thi cuc tre*.