Perhaps you should try some spelling variations:
kmay nang » ky nang, kha nang, may nong
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
may nang » may nong, ky nang, cam nang
nuoc van » nuoc va, nuoc san, luoc van
te sach » toc sach
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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 ((may nang) or (kmay nang)) xa hoi. hieu ve cac nuoc van ((hang di) OR (hang vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((may nang) OR (kmay nang)) xa hoi. hieu ve cac nuoc van ((hang di) OR (hang vi)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((may nang) or (kmay nang)) xa hoi. hieu ve cac nuoc van ((hang di) OR (hang vi)) cuu tre*".