Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
huong doi » huong dan, trong doi, dung doi
va huong » va thuong, va phuong, va tuong
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
doi cau » doi dau, di cau, doi ca
hieu va » lieu va, hieu qua
cac tu » cac thu, cach tu, 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: hoc ((sach ky) OR (sach ty)) nang xa hoi. hieu va ((cac tu) or (cac du)) va huong doi cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sach ty)) nang xa hoi. hieu va ((cac tu) OR (cac du)) va huong doi cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sach ty)) nang xa hoi. hieu va ((cac tu) or (cac du)) va huong doi cau triet".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sach ty)) nang xa hoi. hieu va ((cac tu) or (cac du)) va huong doi cau triet*.