Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cam thuc » am thuc, nam thuc, cam thu
tu sach » thu sach, su sach, te sach
sach lo » sach dao, sach doi, sach hoi
hieu ve » hieu va, hieu van
lo nang » ho nang, ly nang, loai nang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, ma hoa, me hoi
cua te » cua tu

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 lo nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc vat ((hanh tai) or (hang va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach lo nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc vat ((hanh tai) OR (hang va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach lo nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc vat ((hanh tai) or (hang va)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach lo nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc vat ((hanh tai) or (hang va)) cua te*.