Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
thanh ki » thanh kim, thanh ky, thanh ke
nang mai » nang ma, nang tai, nang cai
lang mai » lang dai, lang hai, lang man
cac xuc » cac nuoc, chat xuc, cac cuoc
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
hieu va » lieu va, hieu qua
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach vu ((nang mai) or (lang mai)) hoi. hieu va ((cac xuc) OR (cam xuc)) van thanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu ((nang mai) OR (lang mai)) hoi. hieu va ((cac xuc) OR (cam xuc)) van thanh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu ((nang mai) or (lang mai)) hoi. hieu va ((cac xuc) OR (cam xuc)) van thanh ki su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach vu ((nang mai) or (lang mai)) hoi. hieu va ((cac xuc) OR (cam xuc)) van thanh ki su triet*.