Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
sach ly » sach lo, sach ty, sach hay
van lam » van nam
lam cuu » lam chu, lam cua, cham cuu
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ly) OR (sach y)) nang x hoi. hieu van lam cuu van hanh ((di cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ly) OR (sach y)) nang x hoi. hieu van lam cuu van hanh ((di cua) OR (de cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ly) OR (sach y)) nang x hoi. hieu van lam cuu van hanh ((di cua) or (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ly) OR (sach y)) nang x hoi. hieu van lam cuu van hanh ((di cua) or (de cua)) te*.