Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
bac tuoc » bach tuoc, tac thuoc, bac hoc
cuu tre » cua tre, cau treo
tuoc va » thuoc va, nuoc va, duoc va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
van bac » van ban, van bao, van hac
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: ((su sach) or (so sanh)) v nang xa hoi. thien van bac tuoc va thanh di ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) v nang xa hoi. thien van bac tuoc va thanh di ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) v nang xa hoi. thien van bac tuoc va thanh di ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) v nang xa hoi. thien van bac tuoc va thanh di ((cuu tre) OR (cau tren))*.