Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
va trien » va truyen, va thiet, va tuyen
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach thu, xach tay
gian va » gian van, gian ve, gian ha
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 (sach tu)) ((nang xa) or (sang ma)) hoi. hieu ve cam tuc va thanh gian va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) ((nang xa) OR (sang ma)) hoi. hieu ve cam tuc va thanh gian va trien.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) ((nang xa) or (sang ma)) hoi. hieu ve cam tuc va thanh gian va trien*.