Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
te sach » toc sach
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
van cac » van hac, van cau, van bac
cho hoc » co hoc, khoa hoc
tu nong » tu dong, tu cong, tu tong
tu nang » tu nano, tu lang, vu nang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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 ((((tu nang) OR (tru nang))) or (tu nong)) cho hoc. hieu van cac vuc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((tu nang) OR (tru nang))) OR (tu nong)) cho hoc. hieu van cac vuc van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((((tu nang) OR (tru nang))) or (tu nong)) cho hoc. hieu van cac vuc van hanh vi cua cau*".