Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
vu kham » vu khanh
vu sach » vu bach, vu khach
ve cam » ve cham, ve cac, va cam
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) ky nang o hoi. hieu ((ve cam) or (vu kham)) duc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang o hoi. hieu ((ve cam) OR (vu kham)) duc va hanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang o hoi. hieu ((ve cam) or (vu kham)) duc va hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang o hoi. hieu ((ve cam) or (vu kham)) duc va hanh lai cua te*.