Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
nam thuc » nam thuoc, am thuc, nam thu
cau treo » cau theo, cau tren, cau trieu
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
dan vai » dan va, dan vat, den vai
dan tai » van tai, dan thi, han tai
ky tang » ky nang, ky dang, kho tang
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky tang xa hoi. hieu va nam thuc va ((dan vai) or (dan tai)) ((cau treo) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky tang xa hoi. hieu va nam thuc va ((dan vai) OR (dan tai)) ((cau treo) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky tang xa hoi. hieu va nam thuc va ((dan vai) or (dan tai)) ((cau treo) OR (cau triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang xa hoi. hieu va nam thuc va ((dan vai) or (dan tai)) ((cau treo) OR (cau triet))*.