Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lat cua » luat cua, lai cua, mat cua
dan lat » dan luat, dan dat, dan lap
cam tuc » cam tu, nam thuc, dam thuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
va dan » ca dan, va dao, va dau

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 ((ky lang) or (ky dang)) xa hoi. hieu ve ((cam tuc) or (cam xuc)) va dan lat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve ((cam tuc) OR (cam xuc)) va dan lat cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. hieu ve ((cam tuc) or (cam xuc)) va dan lat cua tre*.