Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
sang xa » song xa, lang xa, sang ma
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, duc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty sang xa hoi. hieu ve cam ((tuc va) or (tuc xa)) hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty sang xa hoi. hieu ve cam ((tuc va) OR (tuc xa)) hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: vu sach ty sang xa hoi. hieu ve cam ((tuc va) or (tuc xa)) hanh vi cua vat*.