Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ca tren » cau tren, cu tren, co tren
cua tre » cua te, cuu tre, cua triet
hanh de » hanh ve, hanh kem
luc ban » duc ban, cuc ban, luc bat
hau luc » hau loc, cau luc, nhan luc
van hau » van ha, van hai, van dau
nang xa » nang x, lang xa, nang ma
la tren » loai tren, dua tren, dat tren
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu van hau luc ban hanh de ((cua tre) or (((ca tren) OR (la tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu van hau luc ban hanh de ((cua tre) OR (((ca tren) OR (la tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu van hau luc ban hanh de ((cua tre) or (((ca tren) OR (la tren))))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van hau luc ban hanh de ((cua tre) or (((ca tren) OR (la tren))))*.