Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
sach hay » sach han, sach ha, sach nay
luoc van » luoc can, luoc va, luot van
sach tay » xach tay, sach nay, sach tai
luc van » luu van, duc van, luc va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tang ma » mang may, tang van
tai cua » thai cua, tai cuc, tri cua
ma hoi » mai hoi, xa hoi, ma hoa

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 tay) OR (sach hay)) tang ma hoi. hieu ve cham ((luc van) or (luoc van)) hanh tai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach tay) OR (sach hay)) tang ma hoi. hieu ve cham ((luc van) OR (luoc van)) hanh tai cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach tay) OR (sach hay)) tang ma hoi. hieu ve cham ((luc van) or (luoc van)) hanh tai cua vat*".