Perhaps you should try some spelling variations:
thien van » thi van
ly quang » le quang
te sach » toc sach
va hanh » van hanh, va thanh, va danh
cac lop » cac hop, cac loai
cac loc » cac toc, cac hoc, cac nuoc
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
d ho » x ho, d h, a ho

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 ((ly quang) OR (vu quang)) d ho. thien van ((cac loc) or (cac lop)) va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly quang) OR (vu quang)) d ho. thien van ((cac loc) OR (cac lop)) va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly quang) OR (vu quang)) d ho. thien van ((cac loc) or (cac lop)) va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly quang) OR (vu quang)) d ho. thien van ((cac loc) or (cac lop)) va hanh vi cuu tre*.