Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
dang xay » dang van, van xay
cham loc » cham soc, chon loc, hau loc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
cham o » cham soc
y dang » ky dang, 2 dang, _ dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y dang xay hoi. hieu va ((cham loc) or (cham o)) ((va thanh) OR (ban thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y dang xay hoi. hieu va ((cham loc) OR (cham o)) ((va thanh) OR (ban thanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y dang xay hoi. hieu va ((cham loc) or (cham o)) ((va thanh) OR (ban thanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach y dang xay hoi. hieu va ((cham loc) or (cham o)) ((va thanh) OR (ban thanh)) vai cua tre*.