Perhaps you should try some spelling variations:
vu khach » vu khac, vay khach, cua khach
vu khanh » vu thanh, van khanh, duy khanh
hanh di » hanh vi, hanh de, hang di
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
y lang » o lang, _ lang, tay lang
di cua » dai cua, doi cua, de 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 khach) OR (vu khanh)) y lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khanh)) y lang xa hoi. hieu ve cam ((duc va) OR (thuc vat)) hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) OR (vu khanh)) y lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) OR (vu khanh)) y lang xa hoi. hieu ve cam ((duc va) or (thuc vat)) hanh di cua tre*.