Perhaps you should try some spelling variations:
thanh bac » nhanh bac, thanh bai, thanh san
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
nang mai » nang ma, nang tai, nang cai
lang mai » lang dai, lang hai, lang man
bac cua » ban cua, tac cua, bai cua
luc ban » duc ban, cuc ban, luc bat
nam luc » nang luc, nhan luc, nam thuc
co sach » bo sach, cuon sach
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (co sach)) y ((nang mai) OR (lang mai)) hoi. hieu van nam luc ban thanh bac cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (co sach)) y ((nang mai) OR (lang mai)) hoi. hieu van nam luc ban thanh bac cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (co sach)) y ((nang mai) OR (lang mai)) hoi. hieu van nam luc ban thanh bac cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (co sach)) y ((nang mai) OR (lang mai)) hoi. hieu van nam luc ban thanh bac cua te*.