Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai
tuc va » thuc va, tuc xa, duc va
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
cua te » cua tu

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 o lang xa hoi. hieu van hac ((tuc va) OR (truc va)) hanh vi ((cau treo) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach o lang xa hoi. hieu van hac ((tuc va) OR (truc va)) hanh vi ((cau treo) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach o lang xa hoi. hieu van hac ((tuc va) OR (truc va)) hanh vi ((cau treo) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach o lang xa hoi. hieu van hac ((tuc va) OR (truc va)) hanh vi ((cau treo) or (cua te))*.