Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, qua cac, qua ca
cau duc » cao duc, cau luc, chu duc
y lang » o lang, _ lang, tay lang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y lang xa hoi. hieu qua cau duc va thanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu qua cau duc va thanh vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu qua cau duc va thanh vi ((cua te) or (cua tu))*.