Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
da nang » cam nang, kha nang, cao nang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
v nang » va nang, vu nang, van nang
va cau » van cau, va cac, va dau

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 ((v nang) or (da nang)) xa hoi. lieu va cau truc van hanh kem ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (da nang)) xa hoi. lieu va cau truc van hanh kem ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (da nang)) xa hoi. lieu va cau truc van hanh kem ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (da nang)) xa hoi. lieu va cau truc van hanh kem ((cua tre) OR (cuu tre))*.