Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
lang chai » lang ha, lang cua, lang phi
cau treo » cau theo, cau tren, cau trieu
lanh hai » manh hai, thanh hai, lanh dao
hieu van » hieu va, thien van, lieu va
nam tuc » nam thuc, nam truc, nam tu
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. hieu van nam tuc va ((lanh hai) or (lang chai)) ((cau treo) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van nam tuc va ((lanh hai) OR (lang chai)) ((cau treo) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu van nam tuc va ((lanh hai) or (lang chai)) ((cau treo) OR (cau triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van nam tuc va ((lanh hai) or (lang chai)) ((cau treo) OR (cau triet))*.