Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cham loc » cham soc, chon loc, hau loc
te sach » toc sach
dan doi » dan hoi, dan toi, van doi
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
cham o » cham soc
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu van ((cham loc) or (cham o)) va dan doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu van ((cham loc) OR (cham o)) va dan doi cua tre*.