Perhaps you should try some spelling variations:
hanh sai » hanh san, hanh tai, danh sai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va hanh » van hanh, va thanh, va danh
ky lang » ky dang, ky tang, tay lang
sai cua » dai cua, hai cua, lai cua
hieu ve » hieu va
cam loc » cam lo
loc va » hoc va, luc va
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: te sach ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu van)) cam loc va hanh sai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu van)) cam loc va hanh sai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu van)) cam loc va hanh sai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu van)) cam loc va hanh sai cua te*.