Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
sach ty » sach y, sach tu, sach thu
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cam) or (ve cac)) tuc va ((hanh lai) OR (hanh tai)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va ((hanh lai) OR (hanh tai)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang x hoi. hieu ((ve cam) or (ve cac)) tuc va ((hanh lai) OR (hanh tai)) cau tren*".