Perhaps you should try some spelling variations:
cac thuat » va thuat, hoc thuat, cac chat
xuyen tai » xuyen tac, nguyen tai, truyen tai
thi cong » tai cong, thien cong
cac thu » cach thuc, cac thoi
cac che » cac chien, cac chat, sach che
ban ly » ban lay, bang ly, ban le
y thi » ky thi, y thai, ly thi
ly y » ly ky
dong* » dung*

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

• Performing a fuzzy search may retrieve terms with similar spellings: xuyen tai ((cac thu) or (((((cac che) OR (cac he))) or (cac thuat)))) đe co ban ly y thi cong dong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: xuyen tai ((cac thu) OR (((((cac che) OR (cac he))) OR (cac thuat)))) đe co ban ly y thi cong dong*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "xuyen tai ((cac thu) or (((((cac che) OR (cac he))) or (cac thuat)))) đe co ban ly y thi cong dong*".