Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nam thuc » nam thuoc, am thuc, nam thu
tinh tai » trinh tai, tinh thai, tinh hai
va tinh » may tinh
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
nam tu » nam thu
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu qua ((nam tu) OR (nam thuc)) va tinh tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. hieu qua ((nam tu) OR (nam thuc)) va tinh tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. hieu qua ((nam tu) OR (nam thuc)) va tinh tai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. hieu qua ((nam tu) OR (nam thuc)) va tinh tai ((cua tre) or (cua te))*.