Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
nang mai » nang ma, nang tai, lang mai
hang tai » hang va, dung tai
sach ty » sach y, sach tu, sach thu
han tai » nhan tai, van tai, toan tai
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam
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 ((xuc va) or (duc va)) ((han tai) OR (hang 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 ((xuc va) OR (duc va)) ((han tai) OR (hang 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 ((xuc va) or (duc va)) ((han tai) OR (hang tai)) dau tren".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang mai hoi. hieu ve cam ((xuc va) or (duc va)) ((han tai) OR (hang tai)) dau tren*.