Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va thanh » gia thanh, ban thanh, va tinh
xang cao » nang cao, lang cao, quang cao
hieu luc » hieu luat, hieu qua
luc cham » luc tham, tuc cham, phuc cham
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va danh, ban hanh
cao hoi » cau hoi, co hoi, cao hoc
y xang » ty xang
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 xang cao hoi. hieu luc cham soc ((va hanh) OR (va thanh)) va ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y xang cao hoi. hieu luc cham soc ((va hanh) OR (va thanh)) va ((cua te) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y xang cao hoi. hieu luc cham soc ((va hanh) OR (va thanh)) va ((cua te) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y xang cao hoi. hieu luc cham soc ((va hanh) OR (va thanh)) va ((cua te) or (cuu tre))*.