Perhaps you should try some spelling variations:
chat tuc » chat xuc, luat tuc, chat huu
van hanh » van thanh, ban hanh, van anh
sach ky » sach y, sach ty, sach kem
dai huu » dao huu, dai hau, dai thua
dai cuu » dai cua
tuc van » thuc van, truc van, tuc va
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky
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: te ((sach ky) OR (sac ky)) nang x hoi. hieu va chat tuc van hanh ((dai cuu) or (dai huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang x hoi. hieu va chat tuc van hanh ((dai cuu) OR (dai huu)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) nang x hoi. hieu va chat tuc van hanh ((dai cuu) or (dai huu)) tre*".