Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dang xay » dang van, van xay
cham loc » cham soc, chon loc, hau loc
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cua tre » cuu tre, cua triet, dua tren
cham o » cham soc
y dang » ky dang, 2 dang, _ dang
cua te » cua tu

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 hanh vai ((cua tre) OR (cua te))~.
• 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 hanh vai ((cua tre) OR (cua te)).
• 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 hanh vai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y dang xay hoi. hieu va ((cham loc) or (cham o)) va hanh vai ((cua tre) OR (cua te))*.