Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
tang xa » trang xa, tang ma, lang xa
luc van » luoc van, luu van, duc van
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
tu sach » thu sach, su sach, tu cach
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (((tu sach) OR (te sach)))) ky tang xa hoi. hieu va cau luc van thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu hoach) or (((tu sach) OR (te sach)))) ky tang xa hoi. hieu va cau luc van thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (((tu sach) OR (te sach)))) ky tang xa hoi. hieu va cau luc van thanh di cua tre*.