Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van cham » van chat, van tham, va cham
cham tuc » nham thuc, pham thuc, tham thuc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
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: hoc sach ky nang xa hoi. thi van cham tuc ((va dinh) or (va tinh)) dai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. thi van cham tuc ((va dinh) OR (va tinh)) dai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang xa hoi. thi van cham tuc ((va dinh) or (va tinh)) dai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. thi van cham tuc ((va dinh) or (va tinh)) dai ((cua tre) OR (cua te))*.