Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cham cuu » cap cuu, chat cua
tay dung » xay dung, tac dung, tay nung
dung xay » dang xay, dung may, dung tay
sach tay » xach tay, sach hay, sach nay
ca tren » cau tren, cu tren, la tren
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tay dung xay hoi. lieu va ((cham soc) or (cham cuu)) va hanh va ((ca tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay dung xay hoi. lieu va ((cham soc) OR (cham cuu)) va hanh va ((ca tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach tay dung xay hoi. lieu va ((cham soc) or (cham cuu)) va hanh va ((ca tren) or (dau tren))*.