Perhaps you should try some spelling variations:
thanh chat » thanh cha, thanh cham, thanh chau
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat tuc » chat xuc, luat tuc, chat huu
va nang » van nang, da nang, cam nang
su sach » so sach, vu sach
tuc gia » tac gia, duc gia, toc gia
y nang » ky nang, ly nang, may nang
v nang » vu nang, van nang, voi nang
va tre » va trien

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 ((y nang) or (((v nang) OR (va nang)))) xa hoi. hieu van chat tuc gia thanh chat va tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (((v nang) OR (va nang)))) xa hoi. hieu van chat tuc gia thanh chat va tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (((v nang) OR (va nang)))) xa hoi. hieu van chat tuc gia thanh chat va tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (((v nang) OR (va nang)))) xa hoi. hieu van chat tuc gia thanh chat va tre*.