Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
chat truc » chat xuc
phan cua » nhan cua, than cua, phat cua
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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 ty) or (sac ky)) nang xa hoi. hieu van ((chat truc) or (cau truc)) va thanh phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sac ky)) nang xa hoi. hieu van ((chat truc) OR (cau truc)) va thanh phan cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sac ky)) nang xa hoi. hieu van ((chat truc) or (cau truc)) va thanh phan cua tre*.