Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
phan thi » pham thi, tran thi, phan tu
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
va phan » van phan, va phat, va phap
thi cua » thai cua, thi cuc, tri cua
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (hoc cao)) ky ((nang xa) OR (nang ma)) hoi. hieu van cam xuc va phan thi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cao)) ky ((nang xa) OR (nang ma)) hoi. hieu van cam xuc va phan thi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc cao)) ky ((nang xa) OR (nang ma)) hoi. hieu van cam xuc va phan thi cua te*".