Perhaps you should try some spelling variations:
lang hai » lang chai, lang thai, lang ha
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
va lang » va nang, hoa lang
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 y nang xa hoi. hieu ve ((cam duc) or (cao duc)) va lang hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve ((cam duc) OR (cao duc)) va lang hai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve ((cam duc) or (cao duc)) va lang hai cua tu*.