Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
tang van » dang van, hoang van, trong van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
cuu tre » cau tren, cau treo
van hoe » van hoa, van hoc, van hieu
y tang » ky tang, 6 tang, 7 tang
dam tu » nam tu, tam tu, dam thuc
cam tu » cam thu, nam tu, tam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y tang van hoe. thien van ((cam tu) or (dam tu)) va hanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y tang van hoe. thien van ((cam tu) OR (dam tu)) va hanh va ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: toc sach y tang van hoe. thien van ((cam tu) or (dam tu)) va hanh va ((cua tre) or (cuu tre))*.