Perhaps you should try some spelling variations:
tran hoang » tran hong, quan hoang, tran quang
tran dang » tran quang, tranh hang, tran van
thai cua » than cua, tai cuc, tri cua
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky xanh » ky anh, ky danh, ky hanh
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
ve cac » va cac, vien cac
a cho » ai cho, va cho, _ cho

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 ky xanh a cho. hieu ve cac duc ((tran dang) or (tran hoang)) thai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky xanh a cho. hieu ve cac duc ((tran dang) OR (tran hoang)) thai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ky xanh a cho. hieu ve cac duc ((tran dang) or (tran hoang)) thai cua viet*.