Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
te sach » toc sach
va hanh » van hanh, va thanh, va danh
cam luc » cau luc
su viet » so viet
sach ky » sac ky, sach y, sach ty
tai su » tai so, tai tu, lai su

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 ky ((lang van) OR (tang van)) hoe. lieu va ((cam luc) or (cam xuc)) va hanh tai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang van) OR (tang van)) hoe. lieu va ((cam luc) OR (cam xuc)) va hanh tai su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang van) OR (tang van)) hoe. lieu va ((cam luc) or (cam xuc)) va hanh tai su viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang van) OR (tang van)) hoe. lieu va ((cam luc) or (cam xuc)) va hanh tai su viet*.