Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va cham » va chat, va tham
lang xa » lang ha, dang xay, lang van
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
vi cua » vai cua, di cua
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu
y lang » o lang, _ lang, tay lang
ve cac » va cac, vien cac
ve cai » va cai, ve tai, ve cau

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

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