Perhaps you should try some spelling variations:
dau tien » van tien
nang doc » nang luc
cach tu » cach thuc
nang co » nang cao, nang noi, nang hoc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
ca dau » ca dao, ca dan, va dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (cach tu)) ((nang co) or (nang doc)) hoi. hieu ve cam xuc va dan ca dau tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (cach tu)) ((nang co) OR (nang doc)) hoi. hieu ve cam xuc va dan ca dau tien.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (cach tu)) ((nang co) or (nang doc)) hoi. hieu ve cam xuc va dan ca dau tien*.