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 di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
y lang » o lang, _ lang, tay lang
ve cam » ve cham, ve cac, va cam
di cuu » di cau, di cua, dinh cuu

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 y lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y lang xa hoi. hieu ve cam ((duc va) OR (thuc vat)) hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach y lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh di cuu tre*.