Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
cam luc » cam xuc, cau luc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
y lang » o lang, _ lang, tay 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 xa hoi. ((lieu va) or (hieu va)) cam luc va danh 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. ((lieu va) OR (hieu va)) cam luc va danh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((lieu va) or (hieu va)) cam luc va danh vi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((lieu va) or (hieu va)) cam luc va danh vi ((cua te) OR (cua tu))*.