Perhaps you should try some spelling variations:
thien van » thi van
hoc sach » hoc sinh, hoc cac, hoc anh
cac thoi » cac toi, cac hop, cac tro
cau tren » cu tren, dau tren, ca tren
thoi gia » thoi gian, hoi gia, thoi gio
thanh vi » hanh vi, thanh va, thanh ve
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
la tren » loai tren, dua tren, dat 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 lo nang xa hoi. thien van cac thoi gia thanh vi ((cua te) or (((cau tren) or (la tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach lo nang xa hoi. thien van cac thoi gia thanh vi ((cua te) OR (((cau tren) OR (la tren)))).
• Adding a wildcard symbol may retrieve word variants: hoc sach lo nang xa hoi. thien van cac thoi gia thanh vi ((cua te) or (((cau tren) or (la tren))))*.