Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, yen lang
luc va » duc va, tuc va, loc va
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) OR (tay lang)) xa hoi. hieu qua cau luc va hanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (tay lang)) xa hoi. hieu qua cau luc va hanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) OR (tay lang)) xa hoi. hieu qua cau luc va hanh vi ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y lang) OR (tay lang)) xa hoi. hieu qua cau luc va hanh vi ((cua te) or (cua tu))*.