Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
te sach » toc sach
dai cuu » dai cua, dai huu
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cao » va cac, va dao, va bao
va co » vo co

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)) ma hoi. hieu ((va cao) OR (va co)) 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)) ma hoi. hieu ((va cao) OR (va co)) duc va tinh dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (v nang)) ma hoi. hieu ((va cao) OR (va co)) duc va tinh dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) ma hoi. hieu ((va cao) OR (va co)) duc va tinh dai cuu tre*.