Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
nang mai » nang ma, nang tai, lang mai
sach ty » sach y, sach tu, sach thu
tai dau » tac dau, tai du, thi dau
han tai » hang tai, nhan tai, van tai
ve cham » va cham, ve chat, vu cham
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
ve cam » ve cac, va cam, ve cai
xuc va » tuc va, luc va, xac va

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 mai hoi. hieu ((ve cam) OR (ve cham)) ((xuc va) or (duc va)) han tai dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((xuc va) OR (duc va)) han tai dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((xuc va) or (duc va)) han tai dau tren".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((xuc va) or (duc va)) han tai dau tren*.