Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
lang thai » lang chai, dang thai, lang hai
thai cua » than cua, tai cuc, tri cua
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
va lang » va nang, hoa lang
cua te » cua tu
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang ma) OR (tang ma)) hoi. ((hieu ve) or (lieu va)) dat nuoc va lang thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang ma) OR (tang ma)) hoi. ((hieu ve) OR (lieu va)) dat nuoc va lang thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang ma) OR (tang ma)) hoi. ((hieu ve) or (lieu va)) dat nuoc va lang thai cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang ma) OR (tang ma)) hoi. ((hieu ve) or (lieu va)) dat nuoc va lang thai cua te*.