Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tri nang » thi nang, tra nang, tri bang
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cac ban » cac dan, cac van, can ban
cam cac » ca cac, nam cac, cam chan
van cam » van nam, van lam, van cau
te sach » toc sach
tu lang » cu lang, tu lanh, xu lang
tu nang » tru nang, tu nong, tu nano
vi cau » va cau, ve cau, di cau

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 (tu lang))) or (tri nang)) xa hoi. hieu van cam cac ban hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((tu nang) OR (tu lang))) OR (tri nang)) xa hoi. hieu van cam cac ban hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: te sach ((((tu nang) or (tu lang))) or (tri nang)) xa hoi. hieu van cam cac ban hanh vi cau tren*.