Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
hanh vai » hanh vi, hanh va, hanh tai
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
vai dau » va dau, van dau, xvii dau
can ky » van ky, dan ky, ban ky
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
tu can » tu ban, tu cac, thu canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky ((sang ma) or (nang ma)) hoi. hieu ve cam tuc va hanh vai dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky ((sang ma) OR (nang ma)) hoi. hieu ve cam tuc va hanh vai dau tren.
• Adding a wildcard symbol may retrieve word variants: tu can ky ((sang ma) or (nang ma)) hoi. hieu ve cam tuc va hanh vai dau tren*.