Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
tu te » tu tu, tu le
dien » bien, vien, tien

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v nang xa hoi. hieu va cham hoc ((va dinh) OR (va tinh)) dien tu te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu va cham hoc ((va dinh) OR (va tinh)) dien tu te".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu va cham hoc ((va dinh) OR (va tinh)) dien tu te*.