Perhaps you should try some spelling variations:
lang hai » lang chai, lang thai, lang ha
tu sach » thu sach, su sach, tu cach
hai cua » thai cua, dai cua, hoi cua
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va lang » va nang, hoa lang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
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: ((tu sach) OR (te sach)) ty nang xa hoi. hieu ((ve cam) or (va cam)) duc va lang hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang xa hoi. hieu ((ve cam) OR (va cam)) duc va lang hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty nang xa hoi. hieu ((ve cam) or (va cam)) duc va lang hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ty nang xa hoi. hieu ((ve cam) or (va cam)) duc va lang hai cua te*.