Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thuat san » thuat toan, thuat song, thuat lanh
dang xay » dang van, van xay
va thanh » gia thanh, ban thanh, va tinh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (thuat san)) ky ((lang xa) or (dang xay)) hoi. hieu ve cac duc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thuat san)) ky ((lang xa) OR (dang xay)) hoi. hieu ve cac duc va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thuat san)) ky ((lang xa) or (dang xay)) hoi. hieu ve cac duc va thanh dai cua tre*.