Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ve cam » ve cham, ve cac, va cam
de cua » le cua, te cua, dieu 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 o lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach o lang xa hoi. hieu ve cam ((duc va) OR (thuc vat)) hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach o lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh de cua tre*.