Perhaps you should try some spelling variations:
te sach » toc sach
hang de » hoang de, hanh de, hang di
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
cua tuc » cua duc, cua tu, cua thuoc
hieu ve » hieu va, hieu van
dau hoi » dai hoi, dan hoi, dau noi
y nang » ky nang, ly nang, v nang
de cua » le cua, te cua, dieu cua
ve cac » va cac, vien cac

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 ((dau hoi) OR (cau hoi)). hieu ve cac ((xuc van) or (luc van)) hang de cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((dau hoi) OR (cau hoi)). hieu ve cac ((xuc van) OR (luc van)) hang de cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((dau hoi) OR (cau hoi)). hieu ve cac ((xuc van) or (luc van)) hang de cua tuc*".