Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
cuc tre » cua tre, cuu tre, cuc thue
duc tre » duoc tren, duc tien
mau ho » mau hop, mau co, mau do
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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 ky nang ((mau ho) or (cau hoi)). hieu va cam tuc va tinh tai ((cuc tre) or (duc tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mau ho) OR (cau hoi)). hieu va cam tuc va tinh tai ((cuc tre) OR (duc tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mau ho) or (cau hoi)). hieu va cam tuc va tinh tai ((cuc tre) or (duc tre))*.