Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
v pham » d pham

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 ty nang ma hoi. hieu ((v pham) OR (vi pham)) duc va thanh lap ((dung tren) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu ((v pham) OR (vi pham)) duc va thanh lap ((dung tren) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. hieu ((v pham) OR (vi pham)) duc va thanh lap ((dung tren) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu ((v pham) OR (vi pham)) duc va thanh lap ((dung tren) or (cau tren))*.