Perhaps you should try some spelling variations:
huong doi » huong dan, trong doi, dung doi
toc sach » hoc sach, doc sach, thuoc sach
hang loi » thang loi, hang doi, tang loi
cau tren » cu tren, dau tren, ca tren
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
cach tu » cach thuc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cac tu » cac thu, cac du, tac tu

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 ty nang xa hoi. hieu va ((cac tu) OR (cach tu)) va ((huong doi) OR (hang loi)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu va ((cac tu) OR (cach tu)) va ((huong doi) OR (hang loi)) cau tren".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu va ((cac tu) OR (cach tu)) va ((huong doi) OR (hang loi)) cau tren*.