Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
nang doc » nang luc
qua cham » qua hai, qua cac, qua cua
kem dau » ke dau, dem dau
va hanh » van hanh, va thanh, va danh
thu sac » thu sach, thu san, thu xac
nang co » nang cao, nang noi, nang hoc
va cham » va chat, va tham
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky ((nang co) or (nang doc)) hoc. hieu ((va cham) or (qua cham)) luc va hanh kem dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang co) OR (nang doc)) hoc. hieu ((va cham) OR (qua cham)) luc va hanh kem dau tren.
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang co) or (nang doc)) hoc. hieu ((va cham) or (qua cham)) luc va hanh kem dau tren*.