Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
chat soc » cham soc, chat hoc, chat doc
thanh ve » hanh ve, thanh va, thanh vien
thanh vi » hanh vi, thanh va, nhanh vi
soc gia » toc gia, hoc gia, so gia
te sach » toc sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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 ((y nang) or (v nang)) xa hoi. hieu ve chat soc gia ((thanh vi) OR (thanh ve)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) xa hoi. hieu ve chat soc gia ((thanh vi) OR (thanh ve)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (v nang)) xa hoi. hieu ve chat soc gia ((thanh vi) OR (thanh ve)) cau tren".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) xa hoi. hieu ve chat soc gia ((thanh vi) OR (thanh ve)) cau tren*.