Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
hieu cua » hieu qua, dieu cua, bieu cua
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ca » hieu cac, hieu va, hieu xa
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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. ((hieu ca) OR (hieu cua)) chat truc va danh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu ca) OR (hieu cua)) chat truc va danh dai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu ca) OR (hieu cua)) chat truc va danh dai ((cua tre) or (cua te))*".