Perhaps you should try some spelling variations:
thanh do » thanh de, thanh pho, thanh hoa
thanh di » thanh doi, thanh de, thanh dinh
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
luc va » duc va, loc va
sach v » sach va, sach y, sach 2
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao
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 v nang xa hoi. hieu va cam ((luc va) or (tuc va)) ((thanh di) OR (thanh do)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. hieu va cam ((luc va) OR (tuc va)) ((thanh di) OR (thanh do)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu va cam ((luc va) or (tuc va)) ((thanh di) OR (thanh do)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu va cam ((luc va) or (tuc va)) ((thanh di) OR (thanh do)) cua tre*.