Perhaps you should try some spelling variations:
te sach » toc sach
dai huu » dao huu, dai hau, dai thua
dai cuu » dai cua
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
ve cac » va cac, vien cac
du gia » duc gia, dau gia, vu gia
v nang » va nang, vu nang, van 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) OR (v nang)) ma hoi. hieu ve cac du gia thanh ((dai cuu) or (dai huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) ma hoi. hieu ve cac du gia thanh ((dai cuu) OR (dai huu)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (v nang)) ma hoi. hieu ve cac du gia thanh ((dai cuu) or (dai huu)) tre*".