Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tru nang » tra nang, tri nang, thi nang
vai cua » dai cua, hai cua, lai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
van cac » van hac, van cau, van bac
te cach » te sach, tu cach, te cac
ve cach » va cach, ve cac, ve canh
cua cau » cua cac, cua chu, cua cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cach) or (ve cach)) ((truc nano) or (tru nang)) co hoc. hieu van cac vuc van anh vai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cach) OR (ve cach)) ((truc nano) OR (tru nang)) co hoc. hieu van cac vuc van anh vai cua cau*.