Perhaps you should try some spelling variations:
truong doi » truong dai, trong doi, truong hoi
xa truong » cac truong
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
co sach » bo sach, cuon sach, hoc sach
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
sach tu » sach thu, cach tu, sach ty
cam tuc » cam xuc, cam tu, dam thuc
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) xa truong doi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach tu nang xa hoi. hieu van ((cam tuc) OR (nam thuc)) xa truong doi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) xa truong doi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: co sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) xa truong doi ((cua tre) OR (cuu tre))*.