Perhaps you should try some spelling variations:
thien van » thi van
vu khach » vu khanh, vu khac, vay khach
hanh lai » hanh lam, hanh tai, thanh lap
vu sach » vu bach, su sach
cao duc » dao duc, cao suc, giao duc
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cac dac, cac nuoc
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
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: ((vu sach) or (vu khach)) y lang xa hoi. thien van ((cac duc) OR (cao duc)) va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) y lang xa hoi. thien van ((cac duc) OR (cao duc)) va hanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) y lang xa hoi. thien van ((cac duc) OR (cao duc)) va hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) y lang xa hoi. thien van ((cac duc) OR (cao duc)) va hanh lai cua te*.