Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
luan anh » luan danh, tuan anh, xuan anh
sach ty » sach y, sach tu, sach thu
lan anh » van anh, tuan anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
ve cac » va cac
di cua » dai cua, doi cua, de 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 ty nang xa hoi. hieu ((ve cac) or (vien cac)) nuoc ((luan anh) OR (lan anh)) di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ((ve cac) OR (vien cac)) nuoc ((luan anh) OR (lan anh)) di cua cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ((ve cac) or (vien cac)) nuoc ((luan anh) OR (lan anh)) di cua cau".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ((ve cac) or (vien cac)) nuoc ((luan anh) OR (lan anh)) di cua cau*.