Perhaps you should try some spelling variations:
chau triet » cua triet, cau trieu, chau tuyet
cau triet » cau trieu, su triet, cua triet
gian lan » gian lang, gian dan, giang van
hieu van » hieu va, thien van, lieu va
va gian » va gianh, van gian, va giai
sach tu » sach thu, cach tu, sach ty
van hac » van hoc, van ha, van hai
nang xa » nang x, lang xa, nang ma
hac xuc » chat xuc
xuc va » duc va, tuc va, luc va

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 tu) or (sach y)) nang xa hoi. hieu van hac xuc va gian lan ((chau triet) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (sach y)) nang xa hoi. hieu van hac xuc va gian lan ((chau triet) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) or (sach y)) nang xa hoi. hieu van hac xuc va gian lan ((chau triet) OR (cau triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) or (sach y)) nang xa hoi. hieu van hac xuc va gian lan ((chau triet) OR (cau triet))*.