Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
te sach » toc sach
hieu va » lieu va, hieu qua
va giao » van giao, va giai, va gia
va tinh » may tinh
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (v nang)) xa hoi. hieu va giao duc va tinh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) xa hoi. hieu va giao duc va tinh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) xa hoi. hieu va giao duc va tinh dai cuu tre*.