Perhaps you should try some spelling variations:
qua phat » qua nhat, qua phan, que phat
nang mai » nang ma, nang tai, nang cai
lang mai » lang dai, lang hai, lang man
hanh ve » hanh vi, hanh va, hanh kem
hoc van » hoc dan, hoc va, hoc vat
loc van » luoc van, lo van, loc va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cau tre » cau tren, cau treo, cau tra
ve cau » ke cau, va cau, ve cac

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 ky ((nang mai) OR (lang mai)) hoi. hieu qua phat ((loc van) or (hoc van)) hanh ve cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang mai) OR (lang mai)) hoi. hieu qua phat ((loc van) OR (hoc van)) hanh ve cau tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang mai) OR (lang mai)) hoi. hieu qua phat ((loc van) or (hoc van)) hanh ve cau tre*".